1 a mixture of sugar with liquid or butter, typically flavored and colored, and used as a coating for cakes or cookies.
2 the formation of ice on an aircraft, ship, or other vehicle, or in an engine.
3 Ice HockeyUSthe action of shooting the puck from one's own end of the rink to the other but not into the goal, for which the referee calls a face-off in one's own end.
– PHRASES the icing on the cake(also North Americanthe frosting on the cake) an attractive but inessential addition or enhancement:
being a scientist is enjoyable, and winning a Nobel is icing on the cake.