1 sleepy, drowsy.
2 inducing drowsiness.
3 Med. in a state between sleeping and waking.
Derivatives:
somnolence n. somnolency n. somnolently adv.
Etymology: ME f. OF sompnolent or L somnolentus f. somnus sleep
Useful english dictionary. 2012.
Useful english dictionary. 2012.