ANTITHETICAL Meaning of ANTITHETICAL in English [an.ti.thet.i.cal] also an.ti.thet.ic adj (1583) 1: constituting or marked by antithesis 2: being in direct and unequivocal opposition syn see opposite -- an.ti.thet.i.cal.ly adv Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012