Definition 2022


knock on wood



knock on wood (third-person singular simple present knocks on wood, present participle knocking on wood, simple past and past participle knocked on wood)

  1. (idiomatic, US) To take a customary action to ward off some misfortune that is believed to be attracted by a presumptuous statement.
  2. (idiomatic, US) A self-directive to undertake the customary action to ward off bad luck.
    I do a lot of walking, and I have never had any knee problems yet, knock on wood.

See also