say it: MAY-tee
matey is an adjective meaning "(used colloquially) having the relationship of friends or pals". It carries one recorded sense.
(used colloquially) having the relationship of friends or pals
colloquialism
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 matey 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.