knocker
Longman Dictionary of Contemporary English 5++LDOCE 5++knock·er /ˈnɒkə $ ˈnɑːkər/ noun [countable] 1. 
DHa piece of metal on an outside door of a house that you hit against the door to attract the attention of the people inside 门环 → doorknocker2. knockers [plural] spoken not politeHBH an offensive word meaning a woman’s breasts 〔女人的一对〕乳房，奶子
DHa piece of metal on an outside door of a house that you hit against the door to attract the attention of the people inside 门环 → doorknocker2. knockers [plural] spoken not politeHBH an offensive word meaning a woman’s breasts 〔女人的一对〕乳房，奶子knock·er nounChineseSyllable
See doorknocker for more
knocker
door‧knock‧er /ˈdɔːˌnɒkə $ ˈdɔːrˌnɑːkər/ 
(also knocker) noun [countable]
a heavy metal ring or bar on a door that you use to knock with
knock‧er /ˈnɒkə $ ˈnɑːkər/ noun [countable]
1. 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
2. knockers [plural] spoken not polite an offensive word meaning a woman’s breasts
| I |
(also knocker) noun [countable]a heavy metal ring or bar on a door that you use to knock with
| II |
noun [countable]1. 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
2. knockers [plural] spoken not polite an offensive word meaning a woman’s breasts
