(transitive, inseparable, idiomatic, slang) To defeat (especially in an argument), get the better of, achieve a success over, gain an advantage or win points over, make a point to the detriment or at the expense of, make appear foolish. Sometimes with particle on (someone).
(transitive, separable, idiomatic) To delete or remove (especially from a list); to score out, strike out or strike off, cross out or cross off; to draw a line through.