null
/nŭl/
adjective
  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.
from The American Heritage® Dictionary of the English Language, 5th Edition. More at Wordnik
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Merriam-Webster
merriam-webster.com › dictionary › null
NULL Definition & Meaning - Merriam-Webster
November 4, 2025 - The meaning of NULL is having no legal or binding force : invalid. How to use null in a sentence. Did you know?
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Cambridge Dictionary
dictionary.cambridge.org › dictionary › english › null
NULL | English meaning - Cambridge Dictionary
4 days ago - NULL definition: 1. having no legal force: 2. with no value or effect: 3. (of a set or matrix) containing nothing…. Learn more.
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Vocabulary.com
vocabulary.com › dictionary › null
Null - Definition, Meaning & Synonyms | Vocabulary.com
Null means having no value; in other words null is zero, like if you put so little sugar in your coffee that it’s practically null. Null also means invalid, or having no binding force.
Discussions

What does “null” mean and why is it here
🌐 r/discordapp
43
51
March 21, 2023
ELI5:What is the difference between 'null' and 'void'?
A contract is null if it's completely nonsensical or illegal to begin with. By virtue of it being null, it is void. A legal contract however, is not null, but it may stipulate terms in which it would later become void - for instance, me forcing you at gunpoint to sign a contract to hand over your assets to me would be a null contract, but you voluntarily signing the contract out of free will would not be null, but you may say that this handover only occurs if I am proven to be your kin. Failing that, the contract is void. More on reddit.com
🌐 r/explainlikeimfive
3
1
December 27, 2014
What does "null" mean?

null is when a variable has no value

More on reddit.com
🌐 r/baconreader
2
0
August 23, 2013
ELI5: What is Null?
Suppose I send you a letter and ask you a question. a) If you send me back the letter with nothing written on it --> empty string b) If you don't send anything back --> NULL EDIT: To incorporate what u/glutier said: In scenario a, I would be able to compare your answer with others (and maybe group you with others who have no opinion on the matter). Whereas in scenario B, I cannot assume anything about your response and therefore cannot compare you to anyone. More on reddit.com
🌐 r/explainlikeimfive
3
2
February 20, 2013
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Dictionary.com
dictionary.com › browse › null
NULL Definition & Meaning | Dictionary.com
1 week ago - Null definition: without value, effect, consequence, or significance.. See examples of NULL used in a sentence.
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Collins Dictionary
collinsdictionary.com › dictionary › english › null
NULL definition and meaning | Collins English Dictionary
6 meanings: 1. without legal force; invalid; (esp in the phrase null and void) 2. without value or consequence; useless 3..... Click for more definitions.
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Wikipedia
en.wikipedia.org › wiki › Null_(mathematics)
Null (mathematics) - Wikipedia
May 4, 2025 - In mathematics, the word null (from German: null meaning "zero", which is from Latin: nullus meaning "none") is often associated with the concept of zero, or with the concept of nothing.
Find elsewhere

mathematical representation of absence of a value

In mathematics, the word null (from German: null meaning "zero", which is from Latin: nullus meaning "none") is often associated with the concept of zero, or with the concept of nothing. It … Wikipedia
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Wiktionary
en.wiktionary.org › wiki › null
null - Wiktionary, the free dictionary
Something that has no force or meaning. (computing) The null character; the ASCII or Unicode character (␀), represented by a zero value, which indicates no character and is sometimes used as a string terminator.
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MDN Web Docs
developer.mozilla.org › en-US › docs › Glossary › Null
Null - Glossary | MDN
July 11, 2025 - In computer science, a null value represents a reference that points, generally intentionally, to a nonexistent or invalid object or address. The meaning of a null reference varies among language implementations.
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Oxford English Dictionary
oed.com › dictionary › null_adj
null, adj. meanings, etymology and more | Oxford English Dictionary
There are 13 meanings listed in OED's entry for the adjective null, one of which is labelled obsolete.
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Reddit
reddit.com › r/discordapp › what does “null” mean and why is it here
r/discordapp on Reddit: What does “null” mean and why is it here
March 21, 2023 - Null is pretty much an empty placeholder in a variable it's neither empty or set with a value, in short if it showing a UI it means a dev messed up
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Merriam-Webster
merriam-webster.com › thesaurus › null
NULL Synonyms: 135 Similar and Opposite Words | Merriam-Webster Thesaurus
4 weeks ago - as in void having no legal or binding force the contract was null because one party forgot to sign it
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Wikipedia
en.wikipedia.org › wiki › Null
Null - Wikipedia
1 month ago - Null (SQL) (or NULL), a special marker and keyword in SQL indicating that a data value does not exist, is not known, or is missing.
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Merriam-Webster
merriam-webster.com › word-of-the-day › null-2023-07-25
Word of the Day: Null | Merriam-Webster
July 25, 2023 - In law it is commonly used in the phrase "null and void" to describe something that has no legal or binding force. Null also has several zero-related meanings, including "amounting to nothing," "having no value," "having no elements," "having zero as a limit," and "of, being, or relating to zero."
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Dictionary.com
dictionary.com › browse › null-and-void
NULL AND VOID Definition & Meaning | Dictionary.com
1 week ago - Null and void definition: 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..
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Urban Dictionary
urbandictionary.com › define.php
Urban Dictionary: null
Unfortunately nobody can be told what the NULL is… NULL is the value that we can not define. This is special value used in db that is given to the field when no value was assigned. In practical life we can consider it as no value.
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TechTerms
techterms.com › definition › null
Null Definition - What does null mean to a computer?
September 26, 2022 - Null, in computing terms, refers to the absence of a value. It does not mean a value of 0, since 0 is itself a value, nor does it mean a blank space " ".
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Quora
quora.com › What-is-the-meaning-of-null-1
What is the meaning of null? - Quora
It can have different meaning in different fields of programming. From wikipedia: * Null (SQL) (or NULL), a special marker and keyword in SQL indicating that something has no value * Null character, the zero-valued ASCII character, also des...
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Cambridge Dictionary
dictionary.cambridge.org › dictionary › english › null-and-void
NULL AND VOID | English meaning - Cambridge Dictionary
September 30, 2025 - NULL AND VOID definition: 1. having no legal force: 2. having no legal force: 3. (of an agreement or contract) having no…. Learn more.
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Encyclopedia Britannica
britannica.com › dictionary › null
Null Definition & Meaning | Britannica Dictionary
NULL meaning: having no legal power often used in the phrase {phrase}null and void{/phrase}