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 lagJ. Netting
jet-lagged adjective

Examples of jet lag in a Sentence

I had bad jet lag after that last trip overseas.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
And that does seem to track well with why jet lag happens, and what many do to get over it. Preston Fore, Fortune, 2 July 2025 Those few precious moments in the spa can aid in refreshing the senses, easing muscle aches, and fighting off jet lag. Bianca Salonga, Forbes.com, 27 June 2025 His impact on the Czech team was felt immediately, despite the travel day and a bit of jet lag. Scott Wheeler, New York Times, 27 Apr. 2025 Wellness takes priority on every Four Seasons jet trip: All itineraries fly west to minimize jet lag (westward travel aligns better with the body’s circadian rhythm), and there are no overnight flights, to ensure guests enjoy a dreamy night’s sleep in their Four Seasons beds. Alexandra Kirkman, Fortune, 18 June 2025 See All Example Sentences for jet lag

Word History

First Known Use

1965, in the meaning defined above

Time Traveler
The first known use of jet lag was in 1965

Browse Nearby Words

Cite this Entry

“Jet lag.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jet%20lag. Accessed 16 Jul. 2025.

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
: 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

More from Merriam-Webster on jet lag

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