initiator initiatively • initiatorily · · · Info · Definitions · Synonyms · Characters · · initiator · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a person who initiates a course of action. Synonyms: instigator. · · Noun Definition 1 Synonyms · · · instigator · · Synonym 1 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074