windjammer noun5 •A sailing ship; especially a large, iron-hulled, square-rigged ship with three or more masts. •A member of the crew of a ship of this kind. •A weatherproof jacket (windcheater). •(US, slang) A windbag, a loquacious person. •(slang, old-fashioned) One who plays a wind instrument, especially a bugler in the army. formswindjammers