knock

knock · verb

imported

Definitions

verb

  1. 1.

    To strike a surface noisily to attract attention, especially on a door.

  2. 2.

    To strike or bump something forcefully.

  3. 3.

    To criticize or find fault with (informal).

Phrases & expressions

  • •
    knock on wood — said to avoid bad luck after a hopeful statement
  • •
    knock it off — stop doing something annoying
  • •
    knock yourself out — go ahead, do as you please
  • •
    the school of hard knocks — learning through difficult life experiences

Related words

See also: knocked, knocking, knockout, knocks
Synonyms: hit, rap, strike, tap

Etymology

From Old English cnocian ("to knock, pound"), of imitative origin.