Thematic \The*mat"ic\, a. [Gr. ?: cf. F. th['e]matique.] 1. (Gram.) Of or pertaining to the theme of a word. See {Theme}, n., 4. 2. (Mus.) Of or pertaining to a theme, or subject. {Thematic catalogue} (Mus.), a catalogue of musical works which, besides the title and other particulars, gives in notes the theme, or first few measures, of the whole work or of its several movements.