Glossary
Travel & Geography
Jet Lag
Definition
A temporary sleep disorder caused by traveling across multiple time zones, disrupting the body's circadian rhythm. Symptoms include fatigue, insomnia, and difficulty concentrating.
Related Terms
Time Zone
A region of the globe that observes a uniform standard time. The world is divided into 24 primary time zones, each offset from UTC by whole or half hours.
UTC/GMT/Zulu Time
Coordinated Universal Time (UTC), the primary time standard used in aviation worldwide. Also known as Greenwich Mean Time (GMT) or Zulu time (indicated by 'Z' suffix).
Red-Eye Flight
A flight that departs late at night and arrives early in the morning, named for the tired, red eyes of passengers who have difficulty sleeping on the overnight journey.