jet lag

noun

: a condition that is characterized by various psychological and physiological effects (such as fatigue and irritability), occurs following long flight through several time zones, and probably results from disruption of circadian rhythms in the human body

Temporary fatigue, drowsiness, and loss of concentration are typical symptoms of isolated bouts of jet lag …

—J. Netting

jet-lagged

ˈjet-ˌlagd 

adjective

Examples of jet lag in a Sentence

I had bad jet lag after that last trip overseas.

Recent Examples on the Web

Sharing your arrival time in advance may help with an early check in, when available, but a relaxation room at the spa or even a treatment can help off set any jet lag or travel woes before unpacking. —Melissa Kravitz Hoeffner, Forbes, 17 Oct. 2024

The Fenix has a jet lag calculator, which helps set your expectations on when to visit the cafe for an afternoon espresso and other recommendations for combating jet lag. —Matthew Medendorp, Travel + Leisure, 24 Sep. 2024

There are different strategies to combat jet lag, depending on your personal tolerance and trip length. —Niccolo Serratt, Condé Nast Traveler, 23 July 2024

Especially since, by that last night on my trip, jet lag had finally caught up with me. —Jaclyn Greenberg, WIRED, 22 Oct. 2024

Word History

First Known Use

1965, in the meaning defined above

Kids Definition

jet lag

noun

: a condition that is marked by physical and mental symptoms (as tiredness and bad temper) and occurs following a long flight through several time zones

Medical Definition

jet lag

noun

ˈjet-ˌlag 

: a condition that is characterized by various psychological and physiological effects (as fatigue and irritability), occurs following long flight through several time zones, and probably results from disruption of circadian rhythms in the human body

called also jet fatigue

jet-lagged adjective