null

[nuhl]
adjective
1.
without value, effect, consequence, or significance.
2.
being or amounting to nothing; nil; lacking; nonexistent.
3.
Mathematics.
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.
Idioms
7.
null and void, without legal force or effect; not valid: This contract is null and void.

Origin:
1555–65; < Latin nūllus, equivalent to n(e) not + ūllus any

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To null
Collins
World English Dictionary
null (nʌl)
 
adj
1.  without legal force; invalid; (esp in the phrase null and void)
2.  without value or consequence; useless
3.  lacking distinction; characterless: a null expression
4.  nonexistent; amounting to nothing
5.  maths
 a.  quantitatively zero
 b.  relating to zero
 c.  (of a set) having no members
 d.  (of a sequence) having zero as a limit
6.  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]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
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, © 2010 Douglas Harper
Cite This Source
American Heritage
Science Dictionary
null   (nŭl)  Pronunciation Key 
Of or relating to a set having no members or to zero magnitude.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
FOLDOC
Computing Dictionary

null definition

programming
A special value used in several languages to represent the thing referred to by an uninitialised pointer. database
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, © Denis Howe 2010 http://foldoc.org
Cite This Source
Example sentences
To start afresh, the derivatives of the real estate should be declared null and
  void.
Since then it has sought unilaterally to declare the arbitral award null and
  void.
And if it does not, the agreement is rendered null and void.
Sadly, what was once a void is now almost null and void.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;