say it: AHYS-bray-kur
icebreaker is a noun meaning "a ship with a reinforced bow to break up ice and keep channels open for navigation". It carries 2 recorded senses.
a beginning that relaxes a tense or formal atmosphere
“he told jokes as an icebreaker”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for icebreaker come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.