Definition of cretinous in English:

cretinous

adjective

  • 1informal, offensive Foolish or stupid.

  • 2Medicine
    dated Physically deformed and having learning difficulties as a result of congenital thyroid deficiency.

Origin

Mid 19th century: from cretin + -ous.

Pronunciation

cretinous

/ˈkrɛt(ə)nəs/