Found 2 items, similar to drowsiness.
English → English (WordNet) Definition: drowsiness drowsiness n : a very sleepy state; “sleepiness causes many driving accidents” [syn: sleepiness, somnolence] [ant: wakefulness]
English → English (gcide) Definition: drowsiness drowsiness \drow"si*ness\, n. State of being drowsy. --Milton. [1913 Webster]