mismix noun 1verb 1forms 3 noun1 •The act, process, or result of mismixing.We have had incidents in the custodial area dealing with chemical safety , a mismix of chemicals without any standards in place. — 2007 verb1 •To mix improperly.You can't mismix, and that's a timesaver. — 1989 formsmismixed · mismixing · mismixes