/uy"sing/ , n.
1. a sweet, creamy spread, as of confectioners' sugar, butter, and flavoring, for covering cakes, cookies, etc.; frosting.
2. Meteorol. a coating of ice on a solid object. Cf. glaze, rime 1 .
3. Aviation. the freezing of atmospheric moisture on the surface of an aircraft.
4. Ice Hockey. the act of a player shooting the puck from the defensive half of the rink over the opponent's goal line, but not into the goal, as a defensive maneuver to keep the puck out of the reach of attacking opponents, resulting in a penalty against the defensive team if the puck is then next touched by an opponent other than the goalkeeper.
5. icing on the cake . See frosting (def. 5).
[ 1760-70; ICE + -ING 1 ]