tri

n. a short name for a triathlon, which is a race that includes swimming, cycling, and running.

n. a colloquial clipping of 'triathlon', referring to a multi-stage competition involving three continuous and sequential endurance disciplines.

“He is training hard for his first sprint tri next month.”

“After completing several local tris, she decided to register for a full-distance event to test her endurance limits.”

Informal

n. a short name for the triceps, the large muscle on the back of your upper arm.

n. a colloquial clipping of 'triceps', specifically referring to the triceps brachii muscle in the context of bodybuilding or anatomy.

“You need to work on your tris if you want bigger arms.”

“The athlete focused on isolation exercises to increase the definition in his tris and deltoids before the competition.”

Informal · Slang