(of a word or words) of, pertaining to, or producing a theme or themes.
b.
(of a vowel) pertaining to the theme or stem: the thematic vowel ends the stem and precedes the inflectional ending of a word form, as i in Latin audiō “I hear.”
Origin: 1690–1700; < Gk thematikós, equiv. to themat- (s. of théma) theme+ -ikos-ic