jet lag
HighInformal to neutral; widely used in everyday, business, and travel contexts. Technical term in medicine/aviation is 'circadian dysrhythmia' or 'desynchronosis'.
Definition
Meaning
A temporary physiological and psychological condition resulting from rapid travel across multiple time zones, disrupting the body's circadian rhythm, primarily characterized by fatigue, sleep disturbance, and difficulty concentrating.
A feeling of general disorientation, exhaustion, or malaise following a long journey or a period of intense change; can be used metaphorically to describe a state of being out of sync with one's surroundings.
Linguistics
Semantic Notes
Primarily an uncountable noun. The concept is specific to long-distance air travel; similar effects from other travel (e.g., road trips) are not typically called 'jet lag'. The effect is directional: eastward travel (losing time) is often more severe than westward.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or spelling. Both varieties use the term identically.
Connotations
Identical. Associated with modernity, business travel, and leisure.
Frequency
Equally common in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] + have/suffer from/get over + jet lag[Subject] + be + suffering from/experiencing + jet lagjet lag + from + [journey/destination]jet lag + after + [journey]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Hit by jet lag”
- “Jet-lagged out”
- “Battling the lag”
Usage
Context Usage
Business
'We'll need a day to recover from jet lag before the negotiations.'
Academic
'The study examined melatonin's efficacy in mitigating symptoms of jet lag.'
Everyday
'I'm still so jet-lagged from my holiday in Thailand.'
Technical
'Pilots follow specific fatigue management protocols to counteract circadian desynchronosis.'
Examples
By Part of Speech
verb
British English
- I'm completely jet-lagged.
- She always jets off to New York and gets terribly jet-lagged.
American English
- He's jet-lagged from the red-eye flight.
- You'll jet-lag yourself flying back and forth so often.
adverb
British English
- He arrived jet-laggedly and went straight to bed.
- She wandered jet-laggedly through the terminal.
American English
- They stumbled jet-laggedly into the hotel lobby.
- He answered questions jet-laggedly during the interview.
adjective
British English
- He gave a jet-lagged smile at the morning meeting.
- The jet-lagged tourists dozed on the coach.
American English
- She had that jet-lagged look after her conference in Tokyo.
- A jet-lagged athlete may underperform.
Examples
By CEFR Level
- I have jet lag.
- The flight was long. Now I am tired with jet lag.
- After flying from London to Tokyo, I had bad jet lag for three days.
- Drink lots of water to help with jet lag.
- Despite her severe jet lag, she managed to attend the first day of the conference.
- Experts recommend adjusting your sleep schedule before departure to minimise jet lag.
- The pervasive effects of jet lag, including impaired cognitive function, can significantly impact business travellers.
- His research focuses on the neurobiological mechanisms underlying the symptoms of circadian desynchronosis, commonly known as jet lag.
Learning
Memory Aids
Mnemonic
JET flies fast, but your body LAGs behind.
Conceptual Metaphor
THE BODY IS A CLOCK (that is out of sync); TRAVEL IS A DISRUPTIVE FORCE.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation like 'реактивный лаг'. The standard translation is 'джетлаг' (джет-лаг) or 'синдром смены часового пояса'. Do not confuse with simple 'усталость' (tiredness).
Common Mistakes
- Using it for non-time-zone travel fatigue (e.g., 'I have jet lag from the train ride').
- Treating it as a countable noun (e.g., 'I have a jet lag' – incorrect).
- Misspelling as 'jetlag' (though common, standard form is two words).
Practice
Quiz
Which scenario most accurately describes experiencing 'jet lag'?
FAQ
Frequently Asked Questions
The standard dictionary form is two words: 'jet lag'. However, the hyphenated form 'jet-lag' (especially as a verb/adjective) and the single word 'jetlag' are commonly seen in informal use.
Yes, informally. The verb form is typically 'to be jet-lagged' (adjective) or, less commonly, 'to jet-lag' (transitive verb), as in 'The long flight really jet-lagged me.'
Travel fatigue is general tiredness from the stress of traveling, regardless of time zones. Jet lag is specifically caused by crossing time zones and involves a mismatch between your internal body clock and the external time, leading to more specific symptoms like night-time insomnia and daytime sleepiness at the destination.
A common rule of thumb is that it takes about one day to adjust for each time zone crossed. So, crossing six time zones could mean roughly six days for your body to fully synchronize. Eastward travel often causes longer-lasting symptoms than westward.