fight-or-flight

adjective

ˈfīt-ər-ˈflīt 

: relating to, being, or causing physiological changes in the body (such as an increase in heart rate or dilation of bronchi) in response to stress

epinephrine is a fight-or-flight hormone

a fight-or-flight reaction

Examples of fight-or-flight in a Sentence

Recent Examples on the Web

Most people recognize the dramatic version of this—the fight-or-flight response. — Joy Nissen, Forbes.com, 10 July 2026

If your home network still puts you in fight-or-flight mode, a modern mesh system is calling your name. — Kelsey Fogarty, PC Magazine, 9 July 2026

As the gut is considered a second brain, the process involves listening in with a stethoscope while manual, hands-on therapy helps the body shift more easily between fight-or-flight and not get stuck in one. — Lydia Bell, Condé Nast Traveler, 23 June 2026

Oxytocin shifts your body out of fight-or-flight mode. — Laura Kiniry, Popular Science, 17 June 2026

Word History

First Known Use

1973, in the meaning defined above

Rhymes for fight-or-flight

• acolyte
• aconite
• allanite
• alunite
• amberlite
• ammonite
• amorite
• amphitrite
• analyte
• anchorite
• andesite
• anhydrite

Medical Definition

fight-or-flight

adjective

ˌfī-tər-ˈflīt

: relating to, being, or causing physiological changes in the body (such as an increase in heart rate or dilation of bronchi) in response to stress

the fight-or-flight response