monitor

noun
mon·​i·​tor | \ ˈmä-nə-tər How to pronounce monitor (audio) \

Definition of monitor

 (Entry 1 of 2)

1a : a student appointed to assist a teacher
b : one that warns or instructs monitors and instructors for troops green in the art of warNew York Times
c : one that monitors or is used in monitoring: such as
(1) : an electronic device with a screen used for display (as of television pictures or computer information)
(2) : a device for observing a biological condition or function a heart monitor

3 [ Monitor, first ship of the type ]

a : a heavily armored warship formerly used in coastal operations having a very low freeboard and one or more revolving gun turrets
b : a small modern warship with shallow draft (see draft entry 1 sense 8) for coastal bombardment
4 : a raised central portion of a roof having low windows or louvers for providing light and air

monitor

verb
monitored; monitoring\ ˈmä-​nə-​t(ə-​)riŋ How to pronounce monitoring (audio) \

Definition of monitor (Entry 2 of 2)

transitive verb

: to watch, keep track of, or check usually for a special purpose Nurses monitored the patient's heart rate.

Keep scrolling for more

Other Words from monitor

Noun

monitorial \ ˌmä-​nə-​ˈtȯr-​ē-​əl How to pronounce monitorial (audio) \ adjective
monitorship \ ˈmä-​nə-​tər-​ˌship How to pronounce monitorship (audio) \ noun

Synonyms for monitor

Synonyms: Verb

cover, watch

Visit the Thesaurus for More 

Examples of monitor in a Sentence

Noun

They watched the press conference on a video monitor in a back room. We put a baby monitor in the nursery. U.N. weapons monitors and inspectors.

Verb

Nurses constantly monitored the patient's heart rate. We're in a good position to monitor and respond to customer concerns. Government agents have been monitoring the enemy's radio communications.
See More

Recent Examples on the Web: Noun

The judge can impose additional fines and additional measures for the company to review Mr. Musk’s tweets, including a monitor who reports to the court, rather than the company, lawyers said. Nina Trentmann, WSJ, "SEC’s Tussle With Tesla’s Elon Musk Shows Challenge of Regulating Iconic CEOs," 26 Feb. 2019 The money will cover body cameras, 26 staff members and a court monitor to try to meet a U.S. District Court judge's orders to rid the agency of discriminatory policing. Rebekah L. Sanders, azcentral, "Maricopa County cuts spending, but property tax bills will still rise," 26 June 2018 But something about jellyfish is also deeply meditative and worthy of a second monitor for all-day background visuals, which is exactly what assistant social media editor Svati Narula has done in the past. The Editors, Outside Online, "The Definitive Ranking of the Best Animal Livestreams," 14 June 2018 The situation was so bad that the state recently appointed a monitor to oversee the program. Ben Joravsky, Chicago Reader, "News / Education / Politics The pattern to Rahm's sexual predator, filthy schools, and special ed scandals," 8 June 2018 Instead of filtering data for humans to sort through, the drones could use that information to increase their own intelligence, eventually replacing humans as a more efficient and effective monitor. Caroline Lester, The Atlantic, "What Happens When Your Bomb-Defusing Robot Becomes a Weapon," 26 Apr. 2018 If a commentator regularly needs a television monitor to deliver proper analysis in game situations, such as the James foul, turning to a VR headset to perform that task seems like it a natural evolution. Ben Golliver, SI.com, "Putting the NBA in Virtual Reality to the Test," 20 Apr. 2018 TVs: Don't toss your old TV or monitor in the trash! Alissa Katz, Good Housekeeping, "How to Dispose of Everything, Including Old Cell Phones, Mattresses, and Batteries," 8 Jan. 2019 Both fitness companies revolve around stationary bikes, but Peloton’s are purchased for in-home use — a notable $2,000 barrier to entry — and its customers pay a monthly fee to access live and prerecorded classes on the bike’s built-in monitor. Rani Molla, Recode, "Peloton now has more U.S. customers than SoulCycle, new data suggests," 3 Dec. 2018

Recent Examples on the Web: Verb

His involvement came together in a matter of days last week, according to Dundon and Alliance co-founder Charlie Ebersol, though Dundon had been monitoring the AAF’s development and debut. Barry Wilner, The Seattle Times, "Hurricanes owner Dundon invests $250 million in Alliance," 19 Feb. 2019 According to Sue, Bill has hired a local security company to record video of and monitor his ex-wife, her two sisters, her sister’s husband, their kids and grandkids—even the Grosses’ longtime personal assistant. Sean Elder, Town & Country, "The War of The Grosses: Inside the Bitter Divorce Battle of the Laguna Beach "Bond King"," 22 Oct. 2018 Special Interest Brett SnyderCranky ConciergeSnyder’s able to suggest the ideal airline for any given route, and his team monitors flights in real time to provide updates on gate changes and delays. Paul Brady, Condé Nast Traveler, "2018 Top Travel Specialists We Trust," 19 Oct. 2018 Indonesia is an archipelago of more than 250 million people and government seismologists monitor more than 120 active volcanoes. Fox News, "Volcano erupts on same Indonesian island as earlier quake," 3 Oct. 2018 Staff members conduct round-the-clock head counts, sometimes at 15-minute intervals, all while monitoring the constant flow of boys being received and discharged. BostonGlobe.com, "A migrant child’s days in detention included cleaning toilets," 14 July 2018 So John Gangemi, a Montana climber and training coordinator with the River Management Society, offered to help monitor the nest sites. Ula Chrobak, Outside Online, "We're Overprotecting Birds at the Expense of Climbers," 12 July 2018 Baltimore officials are expanding a telemedicine program in the Park Heights neighborhood that helps people older than 60 monitor their health from home. Andrea K. Mcdaniels, baltimoresun.com, "City expands telemedicine program for older adults in Park Heights," 12 July 2018 Afterwards, Wendy was hospitalized and was being monitored closely by doctors for Graves’ disease complications, officially making her return indefinite. Selena Barrientos, Good Housekeeping, "'Wendy Williams Show' Fans Think One of Her Guest Hosts Could Replace the Queen of Tea for Good," 13 Feb. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'monitor.' 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 monitor

Noun

1530, in the meaning defined at sense 1a

Verb

1924, in the meaning defined above

History and Etymology for monitor

Noun and Verb

Latin, one that warns, overseer, from monēre to warn — more at mind

Keep scrolling for more

Learn More about monitor

Statistics for monitor

Last Updated

10 Mar 2019

Look-up Popularity

Time Traveler for monitor

The first known use of monitor was in 1530

See more words from the same year

Keep scrolling for more

More Definitions for monitor

monitor

noun

English Language Learners Definition of monitor

 (Entry 1 of 2)

: a device that shows information or images on a screen
: a device that is used to listen to sounds being made in another room
: a device that shows and records information about a condition or function of the body

monitor

verb

English Language Learners Definition of monitor (Entry 2 of 2)

: to watch, observe, listen to, or check (something) for a special purpose over a period of time

monitor

noun
mon·​i·​tor | \ ˈmä-nə-tər How to pronounce monitor (audio) \

Kids Definition of monitor

 (Entry 1 of 2)

1 : a video screen used for display (as of television pictures or computer information)
2 : a student in a school picked for a special duty (as keeping order)
3 : a person or thing that watches or checks something a heart monitor

monitor

verb
monitored; monitoring

Kids Definition of monitor (Entry 2 of 2)

: to watch or check for a special reason Nurses monitored the patient's heart rate.

monitor

noun
mon·​i·​tor | \ ˈmän-ət-ər How to pronounce monitor (audio) \

Medical Definition of monitor

 (Entry 1 of 2)

: one that monitors especially : a device for observing or measuring a biologically important condition or function a heart monitor

monitor

transitive verb
monitored; monitoring\ ˈmän-​ət-​ə-​riŋ, ˈmän-​ə-​triŋ How to pronounce monitoring (audio) \

Medical Definition of monitor (Entry 2 of 2)

1 : to watch, observe, or check closely or continuously monitor a patient's vital signs
2 : to test for intensity of radiations especially if due to radioactivity

Keep scrolling for more

Comments on monitor

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

WORD OF THE DAY

of or relating to a parable or parabola

Get Word of the Day daily email!

Test Your Vocabulary

A Green Quiz

  • shamrock
  • What is the best definition of green-eyed monster?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ

Love words? Need even more definitions?

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