/'nɒkə(r); `nɑkɚ/
n
1 [C] hinged metal hammer attached to a door, used for knocking by sb outside who wants the door to be opened 门环. =>illus at App
1 见附录1插图, page vi.
2 [C] (infml 口) person who constantly criticizes 一味批评的人; 吹毛求疵的人.
3 knockers [pl] ( Brit sl sexist 讳, 俚, 性别偏见) woman's breasts 女子的乳房
*a nice pair of knockers 一对漂亮的乳房.

n[C]

a piece of metal on an outside door of a house that you hit against the door to attract the attention of the people inside
→doorknocker
knockers [plural]spoken not polite an offensive word meaning a woman's breasts