Is “Icing” a Scrabble word?

1.A sweet glaze made primarily of sugar and often flavored, typically used for baked goods; frosting.

2.A minor violation of ice hockey rules, occurring when a player shoots the puck from his/her side of the red line so that it crosses the goal line on the opponent's side. A team playing short-handed is not penalized for this.

3.The process of forming a layer of ice on a surface.