Definition of answer noun from the Oxford Advanced American Dictionary

      

    answer

     noun
    noun
    NAmE//ˈænsər//
     
     
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  1. 1 something that you say, write, or do to react to a question or situation I rang the bell, but there was no answer. a question and answer session answer to something I can't really give an answer to your question. Have you gotten an answer to your letter? As if in answer to our prayers, she offered to lend us $10,000. She had no answer to the accusations.
  2. 2 something that you write or say in reply to a question in a test, an exam, an exercise, etc.; the correct reply to a question in a test, etc. Write your answers on the sheet provided. Do you know the answer to question 12 (= the right one)? The answers are at the back of the book. The sender of the first correct answer to be drawn will receive $100.
  3. 3a solution to a problem There is no easy answer. This could be the answer to all our problems. The obvious answer would be to cancel the party.
  4. 4 a person or thing from one place that may be thought to be as good as a famous person or thing from another place The hotel complex is Las Vegas's answer to Venice.
  5. Idioms
    have/know all the answers(informal)(often disapproving)
     
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    to be confident that you know something, especially when you actually do not He thinks he knows all the answers.
    not take no for an answer
     
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    to refuse to accept that someone does not want something, will not do something, etc. You're coming and I won't take no for an answer!
See the Oxford Advanced Learner's Dictionary entry: answer