master key master in public affairs • master leaf · · · Info · Definitions · Synonyms · Characters · · master key · · Text Common · · Latin · · Scripts 10 · · Length 4 · · Syllables Definitions · · · (noun) key that secures entrance everywhere. Synonyms: passkey, passe-partout, master key, master. · · Noun Definition 1 Synonyms · · · passkey · · Synonym 1 passe-partout · · Synonym 2 master · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 k latin small letter k U+006B m latin small letter m U+006D r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 y latin small letter y U+0079