commissive adjective 2noun 1forms 3 adjective2 •Making a commitment, such as a promise or threat, by illocutionary means."I will kill you if you do that" is a commissive statement. •By commission; resulting from a positive act.This error was commissive rather than omissive. noun1 •A speech act by which a commitment is made, such as a promise or threat. formscommissives · more commissive · most commissive