tire·less | \ˈtī(-ə)r-ləs \

Definition of tireless 

: seemingly incapable of tiring : indefatigable a tireless worker

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Other Words from tireless

tirelessly adverb
tirelessness noun

Examples of tireless in a Sentence

She has been a tireless advocate for reform. a tireless advocate for human rights

Recent Examples on the Web

Li and Yan said Chiang was a tireless supporter of their work. Kevin Truong /, NBC News, "New pop-rock poetry musical shines a spotlight on queer Asian-Americans," 9 July 2018 Sonia Russell Lieutenant Sonia Russell, demonstrates outstanding leadership and tireless effort in addressing the organizational improvement, community enrichment and professional development. Brandon Patterson, Detroit Free Press, "How these 20 women are protecting Detroiters every day," 23 May 2018 Bourdain was a tireless advocate for his girlfriend and the #MeToo movement and went to great lengths to keep the story in the press using his social-media platforms and his connections. Kenzie Bryant, Vanities, "Asia Argento on Anthony Bourdain: “He Was My Love, My Rock, My Protector”," 8 June 2018 Manchester dedicated an island along the Hockanum River in honor of the late Doug Smith, a tireless advocate of the waterway and its trail system. Peter Marteka, courant.com, "An Island Tribute For Trailblazer Doug Smith," 3 June 2018 And no one summed up the unheralded spirit and tireless graft more than the two heroes of Saturday’s 2-0 quarterfinal victory over Sweden in Samara. Martin Rogers, USA TODAY, "England dominates Sweden to reach World Cup semifinals," 7 July 2018 In other words, what long has seemed impossible to dogged, devoted preservationists, nostalgists and the tireless volunteer group known as the Friends of the Uptown is finally happening on Chicago’s North Side. Chris Jones, chicagotribune.com, "Uptown Theatre will be restored: $75 million plan unveiled for grand palace on North Side," 28 June 2018 Despite being arguably the club's most important player, the Blues are believed to be willing to sell the tireless player this summer, with a barrage of offers set to fly in after the World Cup. SI.com, "Real Madrid Set to Dig Heels in Over Mateo Kovačić Exit as Club Look to Hold Onto 'Modrić Successor'," 24 June 2018 All of these awards and donations from the Glenwood Lions Club are made possible thanks to the tireless work of club members and volunteers at the Glenwood Lions Club Snack Bar at the Howard County Fairgrounds. Tracy Trobridge, Howard County Times, "Glenwood Lions Club recognizes police and fire heroes [Glenwood/Glenelg/Dayton]," 12 July 2018

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

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First Known Use of tireless

1591, in the meaning defined above

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Dictionary Entries near tireless

tire chain


tire gage



tire of

tire press

Statistics for tireless

Last Updated

19 Oct 2018

Look-up Popularity

Time Traveler for tireless

The first known use of tireless was in 1591

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More Definitions for tireless



English Language Learners Definition of tireless

: working very hard with a lot of energy for a long time : never seeming to get tired


tire·less | \ˈtīr-ləs \

Kids Definition of tireless

: able to work or persist a long time without becoming tired

Other Words from tireless

tirelessly adverb

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Comments on tireless

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


exaggeratedly or childishly emotional

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