Definition of “mandatory” - English Dictionary

british dictionary

“mandatory” in British English

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mandatoryadjective

uk /ˈmæn.də.tər.i/ us /ˈmæn.də.tɔːr.i/ formal

(Definition of “mandatory” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“mandatory” in American English

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mandatoryadjective [ not gradable ]

us /ˈmæn·dəˌtɔr·i, -ˌtoʊr·i/

made necessary, usually by law or by some other rule:

The test includes a mandatory essay question.

(Definition of “mandatory” from the Cambridge Academic Content Dictionary © Cambridge University Press)

“mandatory” in Business English

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mandatoryadjective

uk /ˈmændətəri/ us /ˈmændəˌtɔri/

used to describe something that must be done, usually because the law states that it is necessary:

mandatory for sb to do sth They would make it mandatory for everyone to have health insurance.
See also

(Definition of “mandatory” from the Cambridge Business English Dictionary © Cambridge University Press)