directionaladj.

/dɪˈrɛkʃənəl/

Etymology: < direction n. + -al suffix¹.

†1. Serving for direction or guidance: see quot. 1612. Obsolete.

ΘΚΠ

society > authority > control > [adjective] > leading or guiding

conductive1528

directional1612

guidinga1616

leadinga1628

manuducent1677

conducting1710

bear-leading1748

bear-leading1766

polar1791

1612 S. Sturtevant Metallica viii. 65 Directionall is that moddle which is made only to guide the Artificer in the dimensions of all the parts, as also for to direct them for the kinds of the matter and the stuffe..to make the engin intended.

2. Of or relating to direction in space.

ΘΚΠ

the world > space > direction > [adjective]

directional1881

orientational1962

1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) II. 168 These directional relations.

1881 Spottiswoode in Nature No. 623. 546 There is a dissymmetry at the two ends or ‘terminals’ of a battery..or other source of electricity, implying a directional character either in that which is transmitted, or in the mode of its transmission.

Categories »

3. Algebra. directional coefficient (of an imaginary quantity), the quotient obtained by dividing the quantity by its modulus.

a. Of or pertaining to the direction or guidance of affairs.

ΘΚΠ

society > authority > control > [adjective] > of or relating to direction

directorial1770

directional1921

1921 Glasgow Herald 5 Mar. 6 The responsibility of so improving his directional control of the conditions of working.

1922 Glasgow Herald 21 Mar. 7 Their doctrine of one directional authority.

1928 Daily Express 26 Sept. 1 All directional and organisation expenses.

b. Of or pertaining to the direction of films, etc.

ΘΚΠ

society > leisure > the arts > performance arts > the theatre or the stage > the staging of a theatrical production > [adjective] > direction

directorial1921

directional1949

society > leisure > the arts > performance arts > cinematography > filming > [adjective] > relating to directing

directorial1921

directional1949

1949 Here & Now (N.Z.) Oct. 29/3 Camera, lighting, directional ‘touches’ are in their subordinate and proper place.

1962 Movie Sept. 25/1 The emotional effect of Exodus is the stronger for being free from directional nudges and promptings.

5. Telecommunications. Concerned with the record of directions indicated by radio signals received from a vessel, etc. Also, pertaining or relating to apparatus that transmits or receives radio signals, etc., more strongly in or from certain directions than others.

ΚΠ

1914 R. Stanley Text-bk. Wireless Telegr. 179 To illustrate the effect of directional aerials at the sender and at the receiver.

1922 Encycl. Brit. XXX. 45/1 There are two methods by which ‘directional wireless’ (as it is termed) can be employed.

1929 Bell Syst. Techn. Jrnl. 8 313 The use of directional receiving antennas is essential to satisfactory and economic results over such distances as the transatlantic radio path.

1930 Aberdeen Press & Jrnl. 26 June 7/1 An occasional directional message from the Cape Race wireless station was the only guidance they could pick up.

1935 Economist 30 Nov. 1062/2 Aerial navigation without wireless is to-day almost unthinkable. Night flying has only been made feasible by directional wireless.

1957 BBC Handbk. 60 To provide an effective signal in the area served by each programme, highly directional short-wave transmitting aerials are used.

1957 BBC Handbk. 219 An efficient type of directional aerial.

1962 A. Nisbett Technique Sound Studio 255 The microphone is thus intensely directional.

Derivatives

diˈrectionally adv. with respect to direction.

ΘΚΠ

the world > space > direction > [adverb]

directionally1879

orientationally1954

1879 W. Thomson & P. G. Tait Treat. Nat. Philos. (new ed.) I: Pt. i. §107 A fixed ring in space (directionally fixed, that is to say, but having the same translational motion as the earth's centre).

This entry has not yet been fully updated (first published 1896; most recently modified version published online September 2021).

单词	directional
释义	directionaladj. /dɪˈrɛkʃənəl/ Etymology: < direction n. + -al suffix¹. †1. Serving for direction or guidance: see quot. 1612. Obsolete. ΘΚΠ society > authority > control > [adjective] > leading or guiding conductive1528 directional1612 guidinga1616 leadinga1628 manuducent1677 conducting1710 bear-leading1748 bear-leading1766 polar1791 1612 S. Sturtevant Metallica viii. 65 Directionall is that moddle which is made only to guide the Artificer in the dimensions of all the parts, as also for to direct them for the kinds of the matter and the stuffe..to make the engin intended. 2. Of or relating to direction in space. ΘΚΠ the world > space > direction > [adjective] directional1881 orientational1962 1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) II. 168 These directional relations. 1881 Spottiswoode in Nature No. 623. 546 There is a dissymmetry at the two ends or ‘terminals’ of a battery..or other source of electricity, implying a directional character either in that which is transmitted, or in the mode of its transmission. Categories » 3. Algebra. directional coefficient (of an imaginary quantity), the quotient obtained by dividing the quantity by its modulus. 4. a. Of or pertaining to the direction or guidance of affairs. ΘΚΠ society > authority > control > [adjective] > of or relating to direction directorial1770 directional1921 1921 Glasgow Herald 5 Mar. 6 The responsibility of so improving his directional control of the conditions of working. 1922 Glasgow Herald 21 Mar. 7 Their doctrine of one directional authority. 1928 Daily Express 26 Sept. 1 All directional and organisation expenses. b. Of or pertaining to the direction of films, etc. ΘΚΠ society > leisure > the arts > performance arts > the theatre or the stage > the staging of a theatrical production > [adjective] > direction directorial1921 directional1949 society > leisure > the arts > performance arts > cinematography > filming > [adjective] > relating to directing directorial1921 directional1949 1949 Here & Now (N.Z.) Oct. 29/3 Camera, lighting, directional ‘touches’ are in their subordinate and proper place. 1962 Movie Sept. 25/1 The emotional effect of Exodus is the stronger for being free from directional nudges and promptings. 5. Telecommunications. Concerned with the record of directions indicated by radio signals received from a vessel, etc. Also, pertaining or relating to apparatus that transmits or receives radio signals, etc., more strongly in or from certain directions than others. ΚΠ 1914 R. Stanley Text-bk. Wireless Telegr. 179 To illustrate the effect of directional aerials at the sender and at the receiver. 1922 Encycl. Brit. XXX. 45/1 There are two methods by which ‘directional wireless’ (as it is termed) can be employed. 1929 Bell Syst. Techn. Jrnl. 8 313 The use of directional receiving antennas is essential to satisfactory and economic results over such distances as the transatlantic radio path. 1930 Aberdeen Press & Jrnl. 26 June 7/1 An occasional directional message from the Cape Race wireless station was the only guidance they could pick up. 1935 Economist 30 Nov. 1062/2 Aerial navigation without wireless is to-day almost unthinkable. Night flying has only been made feasible by directional wireless. 1957 BBC Handbk. 60 To provide an effective signal in the area served by each programme, highly directional short-wave transmitting aerials are used. 1957 BBC Handbk. 219 An efficient type of directional aerial. 1962 A. Nisbett Technique Sound Studio 255 The microphone is thus intensely directional. Derivatives diˈrectionally adv. with respect to direction. ΘΚΠ the world > space > direction > [adverb] directionally1879 orientationally1954 1879 W. Thomson & P. G. Tait Treat. Nat. Philos. (new ed.) I: Pt. i. §107 A fixed ring in space (directionally fixed, that is to say, but having the same translational motion as the earth's centre). This entry has not yet been fully updated (first published 1896; most recently modified version published online September 2021). < adj.1612
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