INTERACTION Definition Meaning - Merriam-Webster The meaning of INTERACTION is mutual or reciprocal action or influence How to use interaction in a sentence mutual or reciprocal action or influence… See the full definition Games; Word of the Day; Grammar; Wordplay; Slang; Rhymes; Word Finder; Thesaurus; Join MWU; More Games; Word of the Day; Grammar; Wordplay; Slang;