overwhelming UK /ˌəʊvəˈwɛlmɪŋ/US /ˌoʊvɚˈwɛlmɪŋ/adjective 3noun 1forms 3 adjective3 •Overpowering, staggering, or irresistibly strong.The vote was taken at once, and it was agreed by an overwhelming majority that rats were comrades. — 1943 •Very great or intense. •Extreme. noun1 •A situation of being overwhelmed. formsoverwhelmings · more overwhelming · most overwhelming