单词 | overlap |
释义 | overlapn. 1. An occurrence or instance of overlapping; the point at or degree by which one edge or thing overlaps another; an overlapping thing. Also figurative. ΘΚΠ the world > space > extension in space > [noun] > extending over > partial extension over overlapping1692 overlap1813 overrunning1867 the world > space > relative position > condition of being external > covering > [noun] > partially > instance of overlap1813 1813 S. Smith Agric. Surv. Galloway 85 (Jam.) When the stones are small, the dykes should be proportionally narrowed, to make the two sides connect more firmly, and afford more overlaps. 1852 Jrnl. Royal Agric. Soc. 13 ii. 298 The nails..are driven through the overlap of both sheets at a time. 1880 W. B. Dawkins Early Man in Brit. i. 4 What we may term the overlap of history [on archaeology]. 1931 A. Keith Place of Prejudice 19 Head and heart are never quite separated; there is a large overlap in their fields of action. 1959 Motor Man. (ed. 36) 37 Just before..the exhaust valve is shut..the inlet valve starts to open. There is thus a period, usually short, when both valves are partly open. This is known as the overlap. 1995 Garden (Royal Hort. Soc.) Nov. p. cviii/5 (advt.) Butt jointed glass with no overlaps. 2. Geology. An increase in the lateral extent of a later stratum in a depositional sequence, relative to those below, so that it extends beyond them (cf. onlap n.); the unconformity that results. Formerly also: †the spreading of a later deposit unconformably over the edges of underlying older strata (cf. overstep n. 2) (obsolete). regressive overlap n. = offlap n. ΘΚΠ the world > the earth > structure of the earth > structural features > sedimentary formation > [noun] > stratum > position or direction of strata > overlap overlap1830 1830 H. T. De la Beche Sections & Views Pl. 3 (caption) Overlap of Chalk and Green-sand, Dorset & Devon. 1846 A. C. Ramsay in Mem. Geol. Surv. Great Brit. I. 319 This..shows a tendency to a certain amount of contemporary depression of coast and sea bottom on the south to admit of an overlap during the formation of these deposits. 1876 Q. Jrnl. Geol. Soc. 32 377 By the term overlap no unconformity is here meant, but the concealment of lower beds by the extension, through a progressive subsidence, of those next in time upon the old rocks. 1913 A. W. Grabau Princ. Stratigr. xviii. 734 (caption) Diagram illustrating regressive overlap (off-lap) and the formation of a sandstone of emergence..into which the shore-ends of the successive members of the retreatal series..grade. 1947 Bull. Amer. Assoc. Petroleum Geologists 31 1868 ‘Overlap’ in geological literature..has often been used to describe..: (1) the regular and progressive pinching-out of sediments above unconformities, and (2) the regular truncation of sediments below unconformities. 1986 Philos. Trans. (Royal Soc.) A. 317 281 Wenlock rocks overstep the Upper Llandovery to rest on middle Ordovician strata.., but there is not necessarily a simple progressive overlap within the Silurian rocks. 3. Sailing. A position in racing in which the sternmost part of one yacht is, or is deemed to be, ahead of the foremost part of another, and in which the yacht which is overtaking and not yet clear ahead must not cut across the path of the other. ΘΚΠ society > leisure > sport > types of sport or game > racing or race > boat racing or race > [noun] > types of rowing race > position > specific overlap1898 1898 Earl of Suffolk et al. Encycl. Sport II. 585/2 If in rounding any mark in a race, or any obstruction, an inside yacht has an overlap, the outside yacht or yachts must give her sufficient room. 1935 Encycl. Sports, Games & Pastimes 760/2 Provided that the overtaking yacht makes her overlap on the side opposite to that on which the overtaken yacht then carries her main boom, the latter may luff as she pleases [etc.]. 1958 Times 23 Sept. 14/2 The American yacht then went smoothly forwards to establish an overlap. 1992 Yachts & Yachting 28 Aug. 14/2 Downwind Schumann hit back at the 1988 bronze medallist and established an overlap two-thirds of the way down the run and held it to the leeward mark. 4. Railways. The distance beyond a signal that must be unoccupied before an engine is allowed to approach it from the previous signal. ΘΚΠ society > travel > rail travel > railway system or organization > [noun] > types of signal system > unoccupied distance beyond signal overlap1925 1925 M. G. Tweedie & T. S. Lascelles Mod. Railway Signalling x. 145 To work without overlaps it would be necessary to have some system of positive speed control which would bring a train to a stand at a stop signal independently of the driver. 1969 H. R. Broadbent Introd. Railway Braking i. 6 The overlap beyond the stop signal is therefore a form of margin on the distance between the warning and stop signals to cover for contingencies. 1992 Mod. Railways Mar. 147/3 Loop length is determined by..the speed of passing trains, tachometer accuracy, and the ability to stop a train within the signal overlap even if the loop has failed. 5. Phonetics and Linguistics. The overlapping or partial coincidence of two or more phonemes, lexical items, etc. ΘΚΠ the mind > language > linguistics > study of speech sound > speech sound > [noun] > overlap overlap1942 the mind > language > linguistics > study of speech sound > speech sound > [noun] > complementary distribution > overlap overlapping1941 overlap1942 1942 Amer. Speech 17 42 There is no over-lap between the length of this vowel when full grade..and its length when reduced grade. 1948 E. A. Nida in Language 24 431 Instances of ‘overlap’, i.e. forms which are in complementary distribution except at certain points where there is a contrast resulting from fluctuation of forms. 1964 Language 40 62 It is possible to raise the question of phonemic overlap... This instance of overlapping phonetic values..need not be regarded as a violation of phonemic principles. 1991 D. Crystal Dict. Linguistics & Phonetics (ed. 3) 246 An example of partial overlap is found between /r/ and /t/ in some dialects of English, where both are realised by the tap in different contexts. 6. a. Rugby. A situation in which the team in possession has more players in its attack than can be marked by the defenders on the opposing team. ΚΠ 1960 Times 31 Oct. 4/4 Later Glover scored a good try after Willcox had made the overlap with Mulligan. 1967 Guide for Players (Rugby Football Union) 50 [The backs] involve creating..the overlap (perhaps by bringing an extra man into the line, e.g., the full back or blindside wing). 1987 Rugby World & Post Mar. 23/2 Webbe's tackle prevented a three-man French overlap from taking advantage of the shortage of Welsh defenders. b. Sport (esp. Association Football). A situation in which a player moves outside of and further upfield than the player in possession, in order to receive a pass. ΘΚΠ society > leisure > sport > types of sport or game > ball game > football > association football > [noun] > actions or manoeuvres holding1866 hand-balling1867 left-footer1874 header1875 handball1879 goal kick1881 corner1882 spot kick1884 middle1899 clearance1920 cross-kick1927 cross-pass1929 body swerve1933 open goal1934 headball1936 chip1939 through-ball1956 wall pass1958 outswinger1959 cross1961 overlap1969 blooter1976 hospital pass1978 route one1978 sidefoot1979 top bin1999 ankle-biting2001 1969 H. Hassall in Alan Ball's Internat. Soccer Ann. 91 If a full-back does become free it should be quite easy to work a straightforward overlap, provided his own wingman affords him some space down the touchline by coming inside. 1976 C. Brackenridge Women's Lacrosse i. 11 The important concept to recognise at this stage is the creation and function of an overlap. 1989 Football Picture Story Monthly No. 81. 5 If Lucas had played Watson deep today and had Garvin coming up on the overlap. 7. Computing. The strictly simultaneous performance of two or more operations during the execution of a program. ΘΚΠ society > computing and information technology > programming language > programme execution > [noun] > concurrent execution multiprogramming1959 overlap1963 1963 L. Schultz Digital Processing xi. 239 The execution of a program might be significantly speeded..by providing an overlap in the time needed for executing one instruction and fetching the next. 1969 P. B. Jordain Condensed Computer Encycl. 365 I/O overlap is a great improvement over strictly sequential operations, but it still leaves the electronics waiting for the slower main memory. 1983 Dict. Computing 255/2 When there is overlap between portions of arithmetic operations..the process is usually called pipelining. Compounds overlap fault n. (a) Mining a fault in which two parts of the same seam come to lie one above the other, esp. with one inverted; (b) Geology (rare) = overthrust fault at overthrust n. ΘΚΠ the world > the earth > structure of the earth > structural features > discontinuity or unconformity > [noun] > fault > other types of fault heave1802 reversed fault1852 reverse fault1865 step-fault1879 ring fracture1881 overfault1883 overlap fault1883 overthrust1883 trough fault1883 thrust1888 thrust-fault1889 offset1897 cross-fault1900 tear-fault1900 distributive fault1904 cross-break1909 slide1910 strike-slip fault1913 rift1921 splay fault1942 wrench fault1951 megashear1954 transform fault1965 transform1971 1883 W. S. Gresley Gloss. Terms Coal Mining 180 Overlap fault, a peculiar kind of fault where a seam is reversed or doubled back over itself. 1886 J. Prestwich Geol. I. xv. 257 (caption) Great slide or overlap fault in the Radstock coalfield. 1902 H. Pim Witwatersrand Gold Mines 7, in Accounting & Business Res. (Nexis) 28 (1998) 281 In the unopened portions of the claim the assay value of the ore may change; the slope of the formation may increase or decrease, the ore sheets become thicker or thinner, overlap faults may double the reef. overlap joint n. a joint in which one edge overlaps another (cf. lap-joint n. at lap n.3 Compounds 2). ΚΠ 1850 Philos. Trans. (Royal Soc.) 140 696 (table) Plates same as before, ·22 inch thick, with overlap joint and double rivets. 1936 E. A. Atkins & A. G. Walker Electr. Arc & Oxy-acetylene Welding (ed. 3) iv. 34 No. 6 is a joggled over-lap joint which is used when it is necessary to have one side of a joint perfectly flush with the plate surface. 2002 Design News (Nexis) 22 Apr. 33 Gentex has conducted strength tests of overlap joints in various sheet stocks and films. This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022). overlapv.1ΘΚΠ the world > space > relative position > condition of being external > covering > wrapping > wrap [verb (transitive)] > enfold or envelop befolda1000 umbefold14.. foldc1394 umbeclipa1395 involvea1420 overfold?1440 warp1513 overroll1548 encompass1553 invest1578 immantle1585 enrol1590 imply1590 circumvest1599 circumvestite1599 enfold1599 convolve1601 shadow1608 overlapc1612 enwreathe1620 obvele1654 obside1695 integument1883 c1612 W. Strachey Hist. Trav. Virginia (1953) i. vii. 94 Their Inwards they stuff with perle, Copper, beades..sowed in a skynne, which they overlappe againe very Carefully in white skynnes. 2. ΘΚΠ society > leisure > sport > types of sport or game > fighting sports > fencing > fence [verb (intransitive)] > actions traversea1470 to hold one's handa1500 flourish1552 lock1579 to come in1594 retire1594 pass1595 recover1600 redouble1640 allonge1652 caveat1652 parry1671 disengage1684 overlap1692 volt1692 tierce1765 whip1771 wrench1771 lunge1809 salute1809 riposte1823 cut1833 quart1833 repost1848 remise1889 1692 W. Hope Compl. Fencing-master (ed. 2) 71 When you overlapp, do it with the broad side of your blade, and not with the Edge. b. transitive. To cause (a thing) to lie over another thing; to cause (things) to lie over each other. Cf. lap v.2 6. ΘΚΠ the world > space > relative position > condition of being external > covering > cover [verb (transitive)] > partially > cause to lap1607 overlap1717 1717 Dict. Rusticum (ed. 2) at Bits The Ends of a Scatch-mouth can never fail, by reason of their being over-lapped. 1846 W. Greener Sci. Gunnery (new ed.) 149 As a brazier would overlap the edge of a tin pipe, for boys to blow peas with. 1914 N.E.D. at Splice A joining of two pieces of wood, etc., formed by overlapping and securing the ends. 1991 A. M. Emmet Sci. Names Brit. Lepidoptera 21 We now know..that geometrids can overlap their wings like the blades of a pair of scissors. 2002 Land & Water Nov.–Dec. 13/3 Each panel was overlapped onto the previous panel, and trimmed. 3. a. transitive. To lie or be situated so as to extend over part of (a thing); to overlie (something) partially. Also figurative: to coincide partly with. ΘΚΠ the world > space > relative position > condition of being external > covering > cover [verb (transitive)] > partially to lap on to (also over, upon)1678 overlap1726 shingle1857 the world > space > extension in space > extend [verb (transitive)] > extend over > partially extend over overlap1813 1726 A. Monro Anat. Humane Bones ii. 74 An Infant, one of whose Ossa parietalia overloped the other. 1726 A. Monro Anat. Humane Bones 116 These cells..are overlopp’d by the Ossa maxillaria. 1753 Chambers's Cycl. Suppl. at Chevaler A horse is said to chevaler when in passaging upon a walk, or a trot, his far fore-leg crosses or over-laps the other fore-leg every second time or motion. 1813 S. Smith Agric. Surv. Galloway 88 (Jam.) It is essential..that the stones frequently overlap one another. a1828 T. Bewick Mem. (1975) xxii. 188 The common Pelt balls then in use, so daubed the cut & blurred & overlapped its edges, that the impression looked disgusting. 1887 G. Saintsbury Hist. Elizabethan Lit. v. 159 These men's lives overlapped each considerably. 1939 Fortune Nov. 83/3 The ‘milk belt’ overlaps the ‘population belt’, and similarly milk production follows population in other parts of the country. 2002 Chicago Daily Herald (Nexis) 28 June 2 Medium build, black hair, brown eyes, clean shaven, front teeth overlapping each other. b. intransitive. To lie or be situated so as to extend over part of a thing; (of two or more things) partially to overlie one other. Also figurative: to coincide partly. ΚΠ 1799 R. Kirwan Geol. Ess. 285 In the Pyrenees, they sometimes overlap. 1824 T. G. Cumming Illustr. Origin Rail & Tram Roads 19 The adjacent rails..are made to overlap a little. 1851 H. Melville Moby-Dick lxxxvi. 417 At the crotch or junction, these flukes slightly overlap, then sideways recede from each other like wings. 1886 W. Stubbs 17 Lect. Study Hist. xiii. 296 Three conjoint systems of jurisprudence..overlapping. 1911 R. Brooke Let. 13 Dec. (1968) 325 Ka appears some days later. James for a weekend... But some (e.g. Ka and Margery) will not overlap; so there'll not be too much of a crowd. 1980 G. Swift Sweet Shop Owner (1983) 18 The magazines and papers, spread, overlapping like roof tiles. 2002 Proteomics Weekly (Nexis) 7 Oct. 5 The beginning sequence of most peptides overlapped with the ends of others, they noted. 4. transitive. To cover and extend beyond (a thing). Also figurative: to exceed. ΘΚΠ the world > space > extension in space > extend [verb (transitive)] > extend over > cover and extend beyond overlap1802 1802 W. Paley Nat. Theol. xvi. 301 The upper bill of the parrot is so much hooked, and so much overlaps the lower, that [etc.]. 1853 E. K. Kane U.S. Grinnell Exped. (1856) xxii. 175 The plantigrade base of support overlapped by long hair heightens the resemblance. 1875 J. F. Clarke in N. Amer. Rev. 120 48 A demand which continually overlapped the supply. 1891 J. G. Bourke On Border with Crook 14 Since then I have had some personal acquaintance, and can aver that in naught did he overlap the truth. 1922 H. Crane Let. 29 Sept. (1965) 101 Its present length will slightly overlap two pages. 1987 Harrowsmith Nov. 51 (caption) They tried to fit a square house onto a trapezoid building lot. They had to get special permission to overlap the city's setback lines. 5. transitive. Geology. Of a formation: to extend beyond the edge of (an older underlying formation). Also (occasionally) intransitive: (of strata) to show such an extension. Cf. overlap n. 2. ΘΚΠ the world > the earth > structure of the earth > structural features > sedimentary formation > [verb (transitive)] > overlap overlap1830 1830 H. T. De la Beche Sections & Views 6 The cretaceous group has extended over a greater area than the Kimmeridge clay, overlapping the strata as on the coasts of dorset and devon. 1871 C. Lyell Elem. Geol. v. 72 Overlapping strata.—Strata are said to overlap, when the upper bed extends beyond the limits of a lower one. 1885 C. Lyell Elem. Geol. v. 69 Sediment spread over a region of subsidence has the area of deposit gradually increased, and the newest formed strata will overlap the next below them. 1904 Bull. Amer. Geogr. Soc. 36 558 Certain Cretaceous strata overlap the peneplain in Long Island and farther south. 1988 Philos. Trans. (Royal Soc.) A. 327 45 The Triassic strata widespread in the Kunlun and Qiangtang Terranes commonly overlap or unconformably overlie Palaeozoic or late Precambrian strata. 6. intransitive. Sport. To create an overlap (overlap n. 6). ΚΠ 1969 H. Hassall in Alan Ball's Internat. Soccer Ann. 91 Seldom will a full-back be fast enough to overlap. 1977 Times 26 Oct. 10/3 Clements, overlapping powerfully on the right, played a full, deep centre and Barnes's close shot was over the goalline. 1987 Sunday Tel. 5 Apr. 46/2 When the ball came back inside Scotland had overlapped everywhere. This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022). overlapv.2 transitive. Of water: to lap or ripple over. Also figurative. Cf. lap v.1 4, 5. ΘΚΠ the world > the earth > water > flow or flowing > wave > movement of waves > [verb (transitive)] > cause to ripple > ripple over overlap1843 1843 W. E. Channing Poems 135 Beneath the endless surges of the deep, Whose green content o'erlaps them ever-more, A host of mariners perpetual sleep. 1863 A. C. Ramsay Physical Geol. & Geogr. Great Brit. (1878) xxxiv. 581 It has been so largely overlapped and worn away by succeeding waves of Celtic invasion. 1872 R. Browning Fifine lxxxi. 24 No lift of ripple to o'erlap Keel, much less, prow. 1905 A. C. Swinburne Poems 90 The wind from the dreary Sea-banks by the waves overlapped, Being weary, speaks peace. 1993 W. Baldwin Hard to catch Mercy xi. 344 Water had long since overlapped the banks and run across the streets and about the houses. This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022). < n.1813v.1c1612v.21843 |
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