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 …

—Jessa 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

Every feature, from visa prompts to packing nudges and jet lag insight, circles back to that potential payoff. —Gretchen Wittenmyer-Stone, Miami Herald, 9 June 2026

The cabin also features Pur air circulation, an advanced HEPA air filtration system, and circadian rhythm lighting to minimize jet lag. —Rachel Cormack, Robb Report, 8 June 2026

For many, the enormous pillows are a partial cure for jet lag, with more options available via a dedicated menu. —Condé Nast, Condé Nast Traveler, 2 June 2026

The airline has worked with researchers from the University of Sydney’s Charles Perkins Center to study passenger wellbeing, jet lag, lighting, sleep and onboard movement during flights lasting nearly an entire day. —Marisa Garcia, Forbes.com, 25 May 2026

Word History

First Known Use

1965, in the meaning defined above

Rhymes for jet lag

• airbag
• handbag
• ragtag
• sandbag
• ag
• bag
• brag
• dag
• drag
• flag
• gag
• hag

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