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English definition of “need”

need

verb (MUST DO)   /nid/ (present tense needs or need)
to have to take an action : [+ to infinitive] He needs to lose weight . [+ to infinitive] Before we make a decision , we need to consider our options . [+ to infinitive] I need to do some shopping on my way home . I don’t think we need ask him. Nothing need be done about this before next week . [+ to infinitive] As it turned out, I didn’t need to buy any extra material (= I did it, although I didn’t have to).
(Definition of need verb (MUST DO) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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