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.

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Idioms for null

    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. 2021

Example sentences from the Web for null

British Dictionary definitions for null

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

Scientific definitions for null

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.