require Definition in the Cambridge English Dictionary
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Definition of “require” - English Dictionary

Definition of "require" - American English Dictionary

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requireverb

 us   /rɪˈkwɑɪər/

require verb (NEED)

[T] to need something, or to make something ​necessary: If you require ​assistance with ​yourbags, I’ll be ​glad to get someone to ​help you. This ​game requires ​totalconcentration.

require verb (ORDER)

to ​order or ​demand something, or to ​order someone to do something, esp. because of a ​rule or ​law: [+ to infinitive] We’re required to ​checkyouridentification before ​letting you in. [T] A ​buildingpermit is required.
(Definition of require from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "require" - British English Dictionary

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requireverb [T]

uk   /rɪˈkwaɪər/  us   /-ˈkwaɪr/
B1 to need something or make something ​necessary: Please ​call this ​number if you require any ​furtherinformation. Skiing at 80 ​milesperhour requires ​totalconcentration. [+ obj + to infinitive ] Bringing up ​children often requires you to put ​theirneeds first. You are required by ​law to ​stopyourcar after an ​accident. [+ that] The ​rules require that you ​bring only one ​guest to the ​dinner.
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(Definition of require from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "require" - Business English Dictionary

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requireverb [T]

uk   us   /rɪˈkwaɪər/ formal
to make it ​officially necessary for someone do something: require sb to do sth Health and ​safetyregulations require all ​staff to ​wearprotectiveclothing. require that The ​contract requires that we ​notify our ​sponsors of all ​changes in ​projectspecification. The ​company is required by ​law to make ​regulartaxreturns.
to need something: This ​project will require ​massiveinvestment. The ​proposed new ​measures require ​approval by the ​board.
(Definition of require from the Cambridge Business English Dictionary © Cambridge University Press)
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