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Null

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null

  [nuhl]
Use Null in a Sentence
–adjective
1. without value, effect, consequence, or significance.
2. being or amounting to nothing; nil; lacking; nonexistent.
3. Mathematics. (of a set)
a. empty.
b. of measure zero.
4. being or amounting to zero.
–noun
5. Electronics. a point of minimum signal reception, as on a radio direction finder or other electronic meter.
–verb (used with object)
6. to cancel; make null.
—Idiom
7. null and void, without legal force or effect; not valid: This contract is null and void.
Origin:
1555–65; < L nūllus, equiv. to n(e) not + ūllus any
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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null   (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.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

null 
"void of legal force," 1563, from M.Fr. nul, from L. nullus "not any, none," from ne- "not, no" (see un-) + illus "any," dim. of unus "one."
Online Etymology Dictionary, © 2001 Douglas Harper
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Legal Dictionary

Main Entry: null
Pronunciation: 'n&l
Function: adjective
Etymology: Anglo-French nul, literally, not any, from Latin nullus, from ne- not + ullus any
: having no legal or binding force : VOID null contract>
Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
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Computing Dictionary

null programming
A special value used in several languages to represent the thing referred to by an uninitialised pointer.
A special value that may be stored in some database columns to represent an unknown, missing, not applicable, or undefined value. Nulls are treated completely differently from ordinary values when evaluating SQL expressions and there are several SQL constructs for dealing with nulls.
(2003-06-17)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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