Knocker



GRE

解释

GRE 红宝书

• n. 敲击的人; 门环
• ［英］ 敲击的人 ( a person or thing that knocks) ; 门环 ( a small metal ring, hammer, etc. attached by a hinge to a door, for use in knocking for admittance)
• ［记］ knock ( 敲) +er

Webster Collegiate

noun

• Date: 14th century
• 1. one that knocks: as
  • a. a metal ring, bar, or hammer hinged to a door for use in knocking
  • b. a persistently pessimistic critic
• 2. often vulgar breast — usually used in plural

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