A reply or response to a question, call, or stimulus; the act of replying or the reply itself.
その質問にはまだ応答がない。
There has been no response to that question yet.
システムの応答が遅いと作業が進まない。
If the system's response is slow, work doesn't progress.
彼は手を挙げて応答した。
He raised his hand and responded.