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English definition of “require”

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require

verb [T] uk   /rɪˈkwaɪər/ us    /-ˈkwaɪr/
B1 to need something or make something necessary: Please phone this number if you require any further information. Skiing at 80 miles per hour requires total concentration. [+ obj + to infinitive ] Bringing up children often requires you to put their needs first. You are required by law to stop your car 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)
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