Search Result for "jet lag":
Wordnet 3.0

NOUN (1)

1. fatigue and sleep disturbance resulting from disruption of the body's normal circadian rhythm as a result of jet travel; 



WordNet (r) 3.0 (2006):

jet lag
    n 1: fatigue and sleep disturbance resulting from disruption of
         the body's normal circadian rhythm as a result of jet
         travel