A doorbell is a bell on the outside of a house which you can ring so that the people inside know that you want to see them.
英漢詞典釋義
n.
門鈴
He refused to answer the doorbell.門鈴響了，但他拒絕去開門。I heard the doorbell ring, and went to see who was there.我聽見門鈴響，就去看誰來了。She pressed on the doorbell.她按了按門鈴。
英英詞典釋義
Noun
1. a push button at an outer door that gives a ringing or buzzing signal when pushed