| 释义 |
null
null N0190000 (nŭl)adj.1. Having no legal force; invalid: render a contract null and void.2. Of no consequence, effect, or value; insignificant.3. Amounting to nothing; absent or nonexistent: a null result.4. Mathematics Of or relating to a set having no members or to zero magnitude.tr.v. nulled, null·ing, nulls To make null.n.1. Zero; nothing.2. An instrument reading of zero.
[French nul, from Old French, from Latin nūllus; see ne in Indo-European roots.]null (nʌl) adj1. without legal force; invalid; (esp in the phrase null and void)2. without value or consequence; useless3. lacking distinction; characterless: a null expression. 4. nonexistent; amounting to nothing5. (Mathematics) maths a. quantitatively zerob. relating to zeroc. (of a set) having no membersd. (of a sequence) having zero as a limit6. (General Physics) physics involving measurement in which an instrument has a zero reading, as with a Wheatstone bridge[C16: from Latin nullus none, from ne not + ullus any]null (nʌl)
adj. 1. without value or significance. 2. being or amounting to nothing; nil. 3. Math. (of a set) a. empty. b. of measure zero. 4. being or amounting to zero. n. 5. a point of minimum signal reception, as on a radio direction finder or other electronic meter. v.t. 6. to cancel; make null. Idioms: null and void, without force or effect; not valid. [1555–65; < Latin nūllus=n(e) not + ūllus any] Thesaurus| Noun | 1. |  null - a quantity of no importance; "it looked like nothing I had ever seen before"; "reduced to nil all the work we had done"; "we racked up a pathetic goose egg"; "it was all for naught"; "I didn't hear zilch about it"goose egg, nada, naught, nil, nix, nothing, zero, zilch, zip, zippo, aught, cypher, cipherrelative quantity - a quantity relative to some purposenihil - (Latin) nil; nothing (as used by a sheriff after an unsuccessful effort to serve a writ); "nihil habet" | | Adj. | 1. |  null - lacking any legal or binding force; "null and void"voidlaw, jurisprudence - the collection of rules imposed by authority; "civilization presupposes respect for the law"; "the great problem for jurisprudence to allow freedom while enforcing order"invalid - having no cogency or legal force; "invalid reasoning"; "an invalid driver's license" |
null adjectivenull and void invalid, useless, void, worthless, ineffectual, valueless, inoperative The agreement had been declared null and void.nullnounNo thing; not anything:nil, nothing.Informal: zero.Slang: nix, zilch.Archaic: aught.Translationsnullnulozéronulloannullarenullaнуль
null
null1. Mathsa. quantitatively zero b. relating to zero c. (of a set) having no members d. (of a sequence) having zero as a limit 2. Physics involving measurement in which an instrument has a zero reading, as with a Wheatstone bridge null[nəl] (mathematics) Indicating that an object is nonexistent or a quantity is zero. (navigation) The azimuth or elevation reading on a navigational device indicated by minimum signal output. Any of the nodal points on the radiation patterns of some antennas. null (programming)A special value used in several languages torepresent the thing referred to by an uninitialised pointer.
A special value that may be stored in some databasecolumns to represent an unknown, missing, not applicable, orundefined value. Nulls are treated completely differentlyfrom ordinary values when evaluating SQL expressions and thereare several SQL constructs for dealing with nulls.nullA character that is all 0 bits. Also written as "NUL," it is the first character in the ASCII and EBCDIC data codes. In hex, it displays and prints as 00; in decimal, it may appear as a single zero in a chart of codes, but displays and prints as a blank space.
Nulls are naturally found in binary numbers when a byte contains all zeros, and they are used to pad fields (see padding). A null may function as a delimiter; for example, in C/C++, a null character is inserted at the end of a character string to mark the end of the text.
 | | The Null Is the First |
|---|
| Note the first character at the top of this chart of ASCII characters. The 00 means 0000-0000 bits. |
null
null Molecular biology
See Null mutation.
Statistics
Completely absent; a set with no members or of zero magnitude. If a field has a value of null, it means that the value is unknown. A null value is not the same as a value of zero, and the difference can be crucial. For example, when calculating the average value of a field among many records where one row contains a zero, the zero gets factored into the average; if the field has a null value, it does not get factored in to the average.Null
Related to Null: null spaceNullOf no legal validity, force, or effect; nothing. As used in the phrase null and void, refers to something that binds no one or is incapable of giving rise to any rights or duties under any circumstances. NULL. Properly, that which does not exist; that which is not in the nature of things. In a figurative sense it signifies that which has no more effect than if it did not exist. 8 Toull. n. 320. NULL
| Acronym | Definition |
|---|
| NULL➣Nation Under Lethal Limitations (clothing company) | | NULL➣Novell Users of Lincoln Land (Illinois) |
null
Related to null: null spaceSynonyms for nullphrase null and voidSynonyms- invalid
- useless
- void
- worthless
- ineffectual
- valueless
- inoperative
Synonyms for nullnoun no thing; not anythingSynonyms- nil
- nothing
- zero
- nix
- zilch
- aught
Synonyms for nullnoun a quantity of no importanceSynonyms- goose egg
- nada
- naught
- nil
- nix
- nothing
- zero
- zilch
- zip
- zippo
- aught
- cypher
- cipher
Related Words- relative quantity
- nihil
- bugger all
- Fanny Adams
- fuck all
- sweet Fanny Adams
adj lacking any legal or binding forceSynonymsRelated Words |