Search Result for "sleepiness": 
Wordnet 3.0

NOUN (1)

1. a very sleepy state;
- Example: "sleepiness causes many driving accidents"
[syn: sleepiness, drowsiness, somnolence]



The Collaborative International Dictionary of English v.0.48:

Sleepiness \Sleep"i*ness\, n.
   The quality or state of being sleepy.
   [1913 Webster]


WordNet (r) 3.0 (2006):

sleepiness
    n 1: a very sleepy state; "sleepiness causes many driving
         accidents" [syn: sleepiness, drowsiness, somnolence]
         [ant: sleeplessness, wakefulness]