toastmaster I. \ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷\noun Etymology:toast (II) + master : one that presides (as at a banquet) and introduces the after-dinner speakers II. transitive verb : to serve as toastmaster at (a particular affair) < toastmaster a testimonial dinner > intransitive verb : to play the part or practice the art of a toastmaster