definition of
knockout

[1] #1 knockout n. [smasher, stunner, beauty, ravisher, sweetheart, peach, lulu, looker, mantrap, dish] a very attractive or seductive looking woman. wn

[2] #2 knockout s. [hard, severe] very strong or vigorous; "strong winds"; "a hard left to the chin"; "a knockout punch"; "a severe blow". wn

[3] #3 knockout n. [KO, kayo] a blow that renders the opponent unconscious. wn