matey noun 3adjective 1forms 3 noun3 •(informal) Diminutive of mate, friend.Hello, matey, just back from the pub? •(slang) A fellow sailor; often used affectedly, especially when portraying a pirate.Ahoy mateys, scrub the deck! •(slang) A dockyard worker.He got the dockyard 'mateys' to install a primitive form of steam heating which he had seen in Navy ships […] — 1979 adjective1 •(UK) Sociable or friendly.You've been very matey with that new bird. formsmateys · matier · matiest