necessity Meaning in the Cambridge English Dictionary
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Meaning of “necessity” in the English Dictionary

"necessity" in British English

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necessitynoun

uk   /nəˈses.ɪ.ti/  us   /-ə.t̬i/
C1 [U] the need for something: You can come early if you ​want to, but there's no necessity for it. [+ to infinitive] Is there any necessity toreply to her ​letter? The ​reportstresses the necessity ofeating plenty of ​freshfruit and ​vegetables. With a ​personalfortune of sixty million ​dollars, she ​certainly doesn't ​work out of necessity (= because she ​needs to). We'll ​employextrastaff to ​help out as and when the necessity arises (= when we need to).C1 [C] something that you need, ​especially in ​order to ​live: We ​brought only the bare necessities with us. He ​regardedmusic as one of life's necessities.
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(Definition of necessity from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"necessity" in American English

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necessitynoun [C/U]

 us   /nəˈses·ɪ·t̬i/
the need for something, or something that is ​needed: [U] Don’t you ​understand the necessity of ​eating a ​balanceddiet? [U] She was ​forced to take the ​job out of necessity. [C] In my ​work, a ​computer is a necessity.
(Definition of necessity from the Cambridge Academic Content Dictionary © Cambridge University Press)
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