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/