The Open Dictionary

drowsiness

noun

UK/ˈdraʊ.zi.nəs/
US/ˈdraʊ.zi.nəs/

Definitions of drowsiness noun

  1. Uncountable

    a state of being tired and sleepy, between wakefulness and sleep

    • He experienced a wave of drowsiness after taking the cold medicine.

    • Long flights often induce a feeling of drowsiness.

    • Her drowsiness made it hard to concentrate.