1

null

adjective \ ˈnəl \

Definition of null

1 :having no legal or binding force :invalid
  • a null contract
2 :amounting to nothing :nil
  • the null uselessness of the wireless transmitter that lacks a receiving station
  • —Fred Majdalany
3 :having no value :insignificant
  • … news as null as nothing …
  • —Emily Dickinson
4 a :having no elements (see element b(3))
  • null set
b :having zero as a limit
  • null sequence
c of a matrix :having all elements equal to zero
5 a :indicating usually by a zero reading on a scale when a given quantity (such as current or voltage) is zero or when two quantities are equal used of an instrument
b :being or relating to a method of measurement in which an unknown quantity (as of electric current) is compared with a known quantity of the same kind and found equal by a null detector
6 :of, being, or relating to zero
  • The meter gave a null reading.
7 :zero 1c

null was our Word of the Day on 04/23/2015. Hear the podcast!

Examples of null in a Sentence

  1. the contract was null because one party forgot to sign it

  2. that information is as null as no information at all

Recent Examples of null from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'null.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Did You Know?

English borrowed "null" from the Anglo-French nul, meaning "not any." That word, in turn, traces to the Latin word nullus, from ne-, meaning "not," and ullus, meaning "any." "Null" often pops up in legal and scientific contexts. It was originally used in Scottish law and still carries the meaning "having no legal or binding force." In math, it is sometimes used to mean "containing nothing"; for example, the set of all whole numbers that are divisible by zero is the "null set" (that is, there are no numbers that fit that description). But "null" also has some more general uses. We often use it with the meaning "lacking meaning or value" (as in "by the time I heard it, the news was null").

Origin and Etymology of null

Anglo-French nul, literally, not any, from Latin nullus, from ne- not + ullus any; akin to Latin unus one — more at no, one

null Synonyms


2

null

noun

Definition of null

1 :zero 3a(1)
2 a :a condition of a radio receiver when minimum or zero signal is received
b :a minimum or zero value of an electric current or of a radio signal

Recent Examples of null from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'null.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of null

see 1null


3

null

verb

Definition of null

transitive verb
:to make null

Examples of null in a Sentence

  1. asked the state court to null the election results because of widespread voting irregularities

Recent Examples of null from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'null.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of null

see 1null


NULL Defined for English Language Learners

null

adjective

Definition of null for English Language Learners

  • law : having no legal power


NULL Defined for Kids

null

adjective \ ˈnəl \

Definition of null for Students

:having no legal force :not binding
  • The law was declared null and void.

Law Dictionary

null

adjective \ ˈnəl \

legal Definition of null

:having no legal or binding force :void
  • a null contract

Origin and Etymology of null

Anglo-French nul, literally, not any, from Latin nullus, from ne- not + ullus any



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