thematic /θɪˈmætɪk/adjective 4noun 2forms 3 adjective4 •Relating to or having a theme (“subject”) or a topic.He had a thematic collection of postage stamps with flags on them (where (UK) thematic collection is equivalent to (US) topical collection) •Relating to a melodic subject. •Of a word stem, ending in a vowel that appears in or otherwise influences the noun or verb's inflection.A considerable number of derived nominals, especially thematic nouns, also exhibited o-grade roots. — 2006 •Of or relating to a theme (“subdivision of the Byzantine empire”). noun2 •A postage stamp that is part of a thematic collection. •A case that indicates the (usually inanimate) party which is a participant to the verbal predicate where that participant does not undergo any tangible change of state. formsthematics · more thematic · most thematic