Definitions of response:

• noun:   a phrase recited or sung by the congregation following a versicle by the priest or minister
• noun:   a result

  Example: "This situation developed in response to events in Africa"

• noun:   a bodily process occurring due to the effect of some foregoing stimulus or agent

  Example: "His responses have slowed with age"

• noun:   the manner in which something is greeted
• noun:   the speech act of continuing a conversational exchange
• noun:   a statement (either spoken or written) that is made in reply to a question or request or criticism or accusation