(1):

(n.) The answer of the people or congregation to the priest or clergyman, in the litany and other parts of divine service.

(2):

(n.) Reply to an objection in formal disputation.

(3):

(n.) A kind of anthem sung after the lessons of matins and some other parts of the office.

(4):

(n.) A repetition of the given subject in a fugue by another part on the fifth above or fourth below.

(5):

(n.) The act of responding.

(6):

(n.) An answer or reply.