adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Exercise with the goal of raising the heart rate. uncountable, usually

   "I did some cardio today instead of lifting weights."

Adjective

1. 1
   Cardiovascular; pertaining to the health of the circulatory and respiratory systems. not-comparable

Synonyms

All synonyms

endurance trainingmetabolic conditioningmonostructuralmonostructural work

Example

More examples

"If you're not sweating when you do cardio, then you're not doing it hard enough."

Etymology

Clipping of cardiovascular.

Related phrases

cardio dayheart rate

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.