activator activation • active · · · Info · Definitions · Antonyms · Characters · · activator · · Text Latin · · Script 9 · · Length Definitions · · · (noun) (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription. · · Noun Definition 1 Antonyms · · · inhibitor · · Antonym 0 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 i latin small letter i U+0069 o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 v latin small letter v U+0076