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English definition of “require”

require

verb [T]     /rɪˈkwaɪər/ formal
to make it officially necessary for someone do something: require sb to do sth Health and safety regulations require all staff to wear protective clothing. require that The contract requires that we notify our sponsors of all changes in project specification. The company is required by law to make regular tax returns.
to need something: This project will require massive investment. The proposed new measures require approval by the board.
(Definition of require verb from the Cambridge Business English Dictionary © Cambridge University Press)
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