Top Definitions
Quiz
Related Content
Examples
British
Scientific

null

[ nuhl ]

/ nʌl /

Save This Word!

See synonyms for null on Thesaurus.com

adjective

without value, effect, consequence, or significance.

being or amounting to nothing; nil; lacking; nonexistent.

Mathematics. (of a set)

empty.
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.

VIDEO FOR NULL

Can "Null" Ever Be A Positive Word?

Why is "null" such a negative word? Let us explain these definitions a little bit more ...

MORE VIDEOS FROM DICTIONARY.COM

QUIZ

QUIZ YOURSELF ON "IS" VS. "ARE"

"Is" it time for a new quiz? "Are" you ready? Then prove your excellent skills on using "is" vs. "are."

Question 1 of 7

IS and ARE are both forms of which verb?

TAKE THE QUIZ TO FIND OUT

Idioms about 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

Words nearby null

nukespeak, Nü-kua, Nukualofa, Nukus, NUL, null, nullah, null and void, nulla-nulla, Nullarbor Plain, null cell

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use null in a sentence

Researchers could only conjecture about why that might be the case, because the null ritual forced them to assume that there is no effect.
How the strange idea of ‘statistical significance’ was born|Bruce Bower|August 12, 2021|Science News
If you’re a crypto advertiser, your existing certification will soon be null.
Changes for crypto advertising and Twitter gets Fleet Ads; Friday’s daily brief|Carolyn Lyden|June 4, 2021|Search Engine Land
To me the null hypothesis is that that natural barefoot or minimal shoe is probably healthier than a more conventional shoe unless you can prove otherwise.
These Shoes Are Killing Me! (Ep. 296 Rebroadcast)|Stephen J. Dubner|May 20, 2021|Freakonomics
To test that, we also should consider a null hypothesis — one that states there’s no effect of a tea cozy.
Getting cozy with a science experiment|Bethany Brookshire|April 13, 2021|Science News For Students

After all those nights spent scanning, weekends in the library learning a new programming language, and hours trouble shooting the experimental setup, I had hoped we would see a novel outcome—but this was a null result, a dud.
The Trouble with Brain Scans - Issue 98: Mind|Kelsey Ichikawa|March 31, 2021|Nautilus
“A suspended sentence becomes null and void after a certain period of time,” Rofugaran said.
Iran Court Sentences ‘Happy’ Dancers to 6 months and 91 Lashes|IranWire|September 17, 2014|DAILY BEAST
Because all of the Rescued Film Project images are scanned to digital, the necessity of a darkroom is null.
These Photographs Would Die Without Him|Dale Eisinger|July 31, 2014|DAILY BEAST
All this means the Constitutional Court could declare election results null and void.
Thai Election Not Likely To Resolve Protests|Lennox Samuels|February 1, 2014|DAILY BEAST
Thus, a law that is unjust is morally null and void, and must be defied until it is legally null and void as well.
Alex Haley’s 1965 Playboy Interview with Rev. Martin Luther King Jr.|Alex Haley|January 19, 2014|DAILY BEAST
Journals aren't interested in null results or "yup, we replicated that other study"; they want new studies with new findings.
Searching for Fraud|Megan McArdle|October 9, 2012|DAILY BEAST
It also declared the acts of any partnership into which such spiritual person had been introduced to be null and void.
The History of England in Three Volumes, Vol.III.|E. Farr and E. H. Nolan
Everything which the revolutionary party had done since August 18,1789, was declared null and void.
Belgium|George W. T. (George William Thomson) Omond
In either case, according to the learned Dr. Sicklewit, the ceremony is utterly null and void of effect.
The Fiend's Delight|Dod Grile
He had alleged that she was a woman of no character, and he had further alleged that their marriage was null and void.
Fair Margaret|H. Rider Haggard
There is no qualification that if we do not deem them legal we can treat them as null and void.
Nullification, Secession Webster's Argument and the Kentucky and Virginia Resolutions|Caleb William Loring

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

quantitatively zero
relating to zero
(of a set) having no members
(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.