null

[ nuhl ]
/ nʌl /

adjective

without value, effect, consequence, or significance.
being or amounting to nothing; nil; lacking; nonexistent.
Mathematics. (of a set)
  1. empty.
  2. of measure zero.
being or amounting to zero.

noun

Electronics. a point of minimum signal reception, as on a radio direction finder or other electronic meter.

verb (used with object)

to cancel; make null.

Idioms

    null and void, without legal force or effect; not valid: This contract is null and void.

Origin of null

1555–65; < Latin nūllus, equivalent to n(e) not + ūllus any
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for null and void

null

/ (nʌl) /

adjective

without legal force; invalid; (esp in the phrase null and void)
without value or consequence; useless
lacking distinction; characterlessa null expression
nonexistent; amounting to nothing
maths
  1. quantitatively zero
  2. relating to zero
  3. (of a set) having no members
  4. (of a sequence) having zero as a limit
physics involving measurement in which an instrument has a zero reading, as with a Wheatstone bridge

Word Origin for null

C16: from Latin nullus none, from ne not + ullus any
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for null and void

null

[ nŭl ]

Of or relating to a set having no members or to zero magnitude.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with null and void

null and void


Canceled, invalid, as in The lease is now null and void. This phrase is actually redundant, since null means “void,” that is, “ineffective.” It was first recorded in 1669.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.