noun

the action of making known one’s thoughts or feelings.

the prisoners developed a dialect as an everyday means of expression

utterance,uttering,voicing,pronouncement,declaration,articulation,verbalization,statement,proclamation,assertion,announcement,setting forth,venting,mouthing,dissemination,broadcast,circulation,communication,spreading,promulgation,publicizing,publication,asseveration,indication,intimation,demonstration,show,exhibition,manifestation,token,conveyance,illustration,revelation,disclosure,embodiment