ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun
1. : an ice apron or other structure that protects a bridge pier from floating ice
2. : a ship designed or equipped (as with a reinforced bow) to make and maintain a channel through the ice
3. : the right whale of the arctic
4. : something that breaks the ice on a project or social occasion
pictures of girls … intended as an icebreaker between us and the French officers — Nathaniel Benchley
specifically : mixer 1c