- resembling an enigma, or a puzzling occurrence, situation, statement, person, etc.; perplexing; mysterious: She has a perpetually enigmatic expression on her face. This is the most enigmatic book I have ever read!
1640s, from Late Latin aenigmaticus, from aenigmat-, stem of aenigma (see enigma). Enigmatical in the same sense is from 1570s. Related: Enigmatically.