car·​dio | \ˈkär-dē-(ˌ)ō \

Definition of cardio 

(Entry 1 of 2)

: cardiovascular sense 2 cardio exercises



Definition of cardio (Entry 2 of 2)

: cardiovascular exercise 30 minutes of cardio daily

Examples of cardio in a Sentence

Recent Examples on the Web: Adjective

Daily cardio sweat sessions double as a natural endorphin high—and an opportunity to meet your next suitor. 7. Zoe Ruffner, Vogue, "10 Beauty Lessons We Learned From Sex and the City, in GIFs," 6 June 2018 Dr Ross and Robert Veatch, a professor at Georgetown University, argue that those options should include not only cardio-respiratory death, but a more liberal definition of brain death based on the irreversible loss of consciousness. The Economist, "When death is not the end," 26 Apr. 2018 Baptiste classes, a vigorous, cardio-intensive practice born out of Power Yoga, are favored by athletes. Noor Brara, Vogue, "Turn Up the Heat With Hot Yoga for a Total Spring Body Reboot," 13 Apr. 2018 Performing these moves in a circuit will mimic the muscular and cardio benefits of burpees with a lower risk of injury—and probably a lot less loathing. Jenny Mccoy, SELF, "Kate Upton’s Trainer Isn’t a Fan of Burpees—Here's Why the Move Is So Controversial," 27 Mar. 2018 The aerobic and cardio equipment at the facility is also easy to use. Lainey Seyler, Milwaukee Journal Sentinel, "Shorehaven's new Strength and Fitness Centers caters to seniors," 1 Mar. 2018 Gravocore, $279, buy now at SportsArt Eco-Pwr cardio equipment Your gift recipient: Pays for electricity, and never misses cardio day. Jay Willis, GQ, "6 Fitness Gifts for the Guy Who Has All the Fitness Gifts Already," 15 Dec. 2017 Monday and Friday were for conditioning; Tuesday, Thursday and Saturday were for strength; Wednesday was cardio work. Rory Smith, New York Times, "The Lonely Road Back From a Very Public Injury," 20 Sep. 2017 John Richard Stein, 37, was given cardio-pulmonary resuscitation and rushed to an area hospital from Cotton Correctional Facility on the morning of Sept. 5, according to a prison activity blotter obtained by the Free Press. Paul Egan, Detroit Free Press, "2 prison nurses suspended over Michigan prisoner's sudden death," 15 Sep. 2017

Recent Examples on the Web: Noun

Llorente’s burpee technique departed from what many consider proper form for the popular cardio and strength-building exercise. Allyson Chiu, ajc, "Woman says she broke burpee world record. Why many disagree," 8 May 2018 Class includes warm up, full body cardio workout and yoga cool down. Elaine Rewolinski, Milwaukee Journal Sentinel, "Breathe events: Eating right, feeling well and getting moving," 13 June 2018 Check in at the front desk, or reserve online ahead of time, for a $25 day pass, which gives you access to cardio machines, free weights, and TRX, along with floor space for yoga. Marie Salcido, Sunset, "The Best New Place to Squeeze in a Workout: The Airport," 22 Jan. 2018 Thirty minutes of cardio with marathon bursts of increased speed and higher inclines—and no stopping. Aarti Sanan, Redbook, "Marching to Barry's Bootcamp," 14 Jan. 2012 Dance Syncopation: Cardio Dance offered Wednesdays from 9:15 to 10 a.m. Follow Sue C. through simple, yet powerful dance cardio choreography that will torch calories. Courant Community, "Community News For The Colchester Edition," 10 July 2018 Sunday ▪ SHAE Movement African Arts — which combines cardio fitness and African dance with weekly classes and workshops in NoDa — presents its annual dance concert, Amour, L’umiere, et Honneur; Love, Light, and Honor at McGlohon Theater. Courtney Devores, charlotteobserver, "Your 5-minute guide to the best things to do in Charlotte | June 15-21," 14 June 2018 The new two-story Phoenician Athletic Club includes a 4,600-square-foot fitness center with cardio machines, weights and a fitness studio with 200 classes on demand. Dawn Gilbertson, azcentral, "Check out the Phoenician resort's fresh look: New spa, golf course, lobby," 11 July 2018 Today was just the standard fitness & cardio tests players go through on first day., "Antonio Conte Expected to Oversee Chelsea Training Sessions This Week Despite Uncertain Future," 9 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cardio.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of cardio


1984, in the meaning defined above


1991, in the meaning defined above

Keep scrolling for more

Learn More about cardio

Statistics for cardio

Look-up Popularity

Time Traveler for cardio

The first known use of cardio was in 1984

See more words from the same year

Keep scrolling for more

More Definitions for cardio



English Language Learners Definition of cardio

: any type of exercise that causes the heart to beat faster and harder for a period of time


car·​dio | \ˈkärd-ē-(ˌ)ō \

Medical Definition of cardio 

(Entry 1 of 2)

: cardiovascular sense 2 cardio exercises worked out on cardio machines



Medical Definition of cardio (Entry 2 of 2)

: cardiovascular exercise 30 minutes of cardio daily

Comments on cardio

What made you want to look up cardio? Please tell us where you read or heard it (including the quote, if possible).


full of whispering sounds

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!