D defs.my
Entry 2 senses Webster, 1913

icebreaker

· IPA /ˈaɪsˌbɹeɪkəɹ/
01 n. a ship with a reinforced bow and powerful engines designed to break up layers of ice on waterways and keep channels open for navigation.
  1. 1.
    a ship with a reinforced bow and powerful engines designed to break up layers of ice on waterways and keep channels open for navigation.
  2. 2.
    A remark or action intended to relieve tension or reduce formality when initiating conversation or beginning a speech; it is often a humorous or light remark.
Syn. iceboat.