thematic

From Ancient Greek θεματικός (thematikós), from θέμα (théma, “theme”). Equivalent to theme +‎ -atic.

• IPA^(key): /θɪˈmætɪk/, /θɛˈmætɪk/

• Audio (Southern England)

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thematic (comparative more thematic, superlative most thematic)

1. 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)

2. (music) Relating to a melodic subject.
3. (grammar) Of a word stem, ending in a vowel that appears in or otherwise influences the noun or verb's inflection.
   • 2006, Donald Ringe, From Proto-Indo-European to Proto-Germanic (A Linguistic History of English; 1)‎, Oxford: Oxford University Press, →ISBN, page 12:

     A considerable number of derived nominals, especially thematic nouns, also exhibited o-grade roots.

4. (history) Of or relating to a theme (“subdivision of the Byzantine empire”).

thematic (plural thematics)

1. A postage stamp that is part of a thematic collection.

• mathetic