An answer is a letter that you write to someone who has written to you. I wrote to him but I never had an answer back She wrote to Roosevelt's secretary in answer to his letter of the day before. = reply, response
be sufficient; be adequate, either in quality or quantity; "A few words would answer"; "This car suits my purpose well"; "Will $100 do?"; "A 'B' grade doesn't suffice to get me into medical school"; "Nothing else will serve"
Your answer to something that someone has said or done is what you say or do in response to it or in defence of yourself. In answer to speculation that she wouldn't finish the race, she boldly declared her intention of winning it. = reply, response
To speak or write by way of return (originally, to a charge), or in reply; to make response
a statement (either spoken or written) that is made in reply to a question or request or criticism or accusation; "I waited several days for his answer"; "he wrote replies to several of his critics"
react to a stimulus or command; "The steering of my new car answers to the slightest touch"
the defendant's response to the plaintiff's compliant The answer admits or denies the claims in the plaintiff's complaint