Definition of onomasiology in English:

onomasiology

noun

  • [mass noun] The branch of linguistics that deals with concepts and the terms that represent them, in particular contrasting terms for similar concepts, as in a thesaurus.

    Compare with semasiology

Origin

Early 20th century: from Greek onomasia term + -logy.

Pronunciation

onomasiology

/ˌɒnə(ʊ)meɪsɪˈɒlədʒi/