Definition of oscitancy in US English:

oscitancy

noun

rare
  • Drowsiness as evidenced by yawning; dullness; indolence, negligence, inattention.

Origin

Early 17th century. From oscitant: see -ancy. Compare post-classical Latin oscitantia.

Pronunciation

oscitancy

/ˈɒsɪt(ə)nsi/