1.
[syn: antithetic, antithetical]
The Collaborative International Dictionary of English v.0.48:
Antithetic \An`ti*thet"ic\, Antithetical \An`ti*thet"ic*al\, a.
[Gr. ?.]
Pertaining to antithesis, or opposition of words and
sentiments; containing, or of the nature of, antithesis;
contrasted.
[1913 Webster]
WordNet (r) 3.0 (2006):
antithetic
adj 1: sharply contrasted in character or purpose; "practices
entirely antithetical to her professed beliefs"; "hope is
antithetic to despair" [syn: antithetic,
antithetical]