Definition of require verb from the Oxford Advanced Learner's Dictionary

        

    require

     verb
    verb
    BrE BrE//rɪˈkwaɪə(r)//
     
    ; NAmE NAmE//rɪˈkwaɪər//
     
    (not usually used in the progressive tenses)(formal)Verb Forms present simple I / you / we / they require
    BrE BrE//rɪˈkwaɪə(r)//
     
    ; NAmE NAmE//rɪˈkwaɪər//
     
    he / she / it requires
    BrE BrE//rɪˈkwaɪəz//
     
    ; NAmE NAmE//rɪˈkwaɪərz//
     
    past simple required
    BrE BrE//rɪˈkwaɪəd//
     
    ; NAmE NAmE//rɪˈkwaɪərd//
     
    past participle required
    BrE BrE//rɪˈkwaɪəd//
     
    ; NAmE NAmE//rɪˈkwaɪərd//
     
    -ing form requiring
    BrE BrE//rɪˈkwaɪərɪŋ//
     
    ; NAmE NAmE//rɪˈkwaɪərɪŋ//
     
     
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  1. 1  to need something; to depend on somebody/something require something These pets require a lot of care and attention. Deciphering the code requires an expert. This condition requires urgent treatment. Do you require anything else? (= in a shop/store, for example) require somebody/something to do something True marriage requires us to show trust and loyalty. require that… The situation required that he be present. (British English also) The situation required that he should be present. require doing something Lentils do not require soaking before cooking.
  2. 2  [often passive] to make somebody do or have something, especially because it is necessary according to a particular law or set of rules require something The wearing of seat belts is required by law. ‘Hamlet’ is required reading (= must be read) for this course. Several students failed to reach the required standard. I just require a signature on the form. require something of somebody What exactly is required of a receptionist (= what are they expected to do)? require somebody to do something All candidates will be required to take a short test. require that… We require that you comply with the following rules:… Synonymsdemandrequire expect insist askThese words all mean to say that somebody should do or have something.demand to ask for something very firmly; to say very firmly that somebody should have or do something:She demanded an immediate explanation.require [often passive] (rather formal) to make somebody do or have something, especially because it is necessary according to a law or set of rules or standards:All candidates will be required to take a short test.expect to demand that somebody should do, have or be something, especially because it is their duty or responsibility:I expect to be paid promptly for the work.insist to demand that something happens or that somebody agrees to do something:I didn’t want to go but he insisted. We insist on the highest standards at all times.ask to expect or demand something:You’re asking too much of him.demand, expect or ask? Ask is not as strong as demand or expect, both of which can be more like a command.Patterns to demand/​require/​expect/​ask something of/​from somebody to demand/​require/​expect/​insist/​ask that… to require/​expect/​ask somebody to do something to demand/​require/​expect/​ask a lot/​too much/​a great deal to be too much to expect/​ask
  3. Word Origin late Middle English: from Old French requere, from Latin requirere, from re- (expressing intensive force) + quaerere ‘seek’.Extra examples These plants absolutely require shade. ‘Hamlet’ is required reading for the class. Do you require anything else? The law requires that everyone wear a seat belt. These lentils do not require soaking before cooking. What exactly is required of a receptionist?
See the Oxford Advanced American Dictionary entry: require