re·sponse /rɪˈspɑ:ns/ noun plural re·spons·es
something that is said or written as a reply to something [count
] ▪ He got a response to his letter.
] ▪ I am writing in response to your letter of July 17. ▪ She asked him but he gave/made no response. [=he did not answer]
something that is done as a reaction to something else [count
] ▪ When I told him my plan, I wasn't expecting such an enthusiastic response. ▪ Her response to their decision was to threaten to quit her job. ▪ The patient suffered an adverse response to the medication. [=the patient became worse after taking the medication]
] ▪ When you knocked on the door, was there any response?