tire·​less | \ ˈtī(-ə)r-ləs How to pronounce tireless (audio) \

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 This is due to the tireless work of our friends at @PHLRealJustice. refinery29.com, "Frank Rizzo’s Statue Was An Ode To White Supremacy — & It Never Should Have Existed," 3 June 2020 Rush Limbaugh: Thank you for your decades of tireless devotion to our country. Sanya Mansoor, Time, "Read the Full Transcript of President Trump's 2020 State of the Union Address," 5 Feb. 2020 The unusual moment came days after Limbaugh, 69, announced he had been diagnosed with late-stage lung cancer. ‘‘Rush Limbaugh, thank you for your decades of tireless devotion to our country,’’ Trump said. BostonGlobe.com, "With presidential medal, Rush Limbaugh joins the likes of Mother Teresa," 5 Feb. 2020 Kobe is being remembered as a tireless advocate for girls in sports. NBC News, "MJ remembers his 'little brother'," 25 Feb. 2020 Biliew, who picked up a college basketball offer from Iowa before entering high school, is a dynamic athlete and tireless defender. Richard Obert, azcentral, "Top 2023 basketball prospect Omaha Biliew transfers to Hillcrest Prep in Gilbert," 2 May 2020 This pairing of short films sheds light on the tireless work of caregivers tasked with providing comfort and care to patients with incurable conditions. Freep.com, "Watch ‘Palliative’ and ‘Today Was a Good Day’ at virtual Freep Film Festival," 20 Apr. 2020 To honor public health workers and researchers in the scientific community for their tireless work on the frontlines of the coronavirus pandemic, Google's landing page looks a bit different today. Anabel Pasarow, refinery29.com, "Today’s Goodle Doodle Thanks Public Health Workers," 6 Apr. 2020 After his retirement, his tireless work in the community impacted thousands of young people in Houston. Kristie Rieken, BostonGlobe.com, "Former Astros star Jimmy ‘The Toy Cannon’ Wynn dies at 78," 27 Mar. 2020

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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Time Traveler for tireless

Time Traveler

The first known use of tireless was in 1591

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Statistics for tireless

Cite this Entry

“Tireless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tireless. Accessed 7 May. 2021.

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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 How to pronounce tireless (audio) \

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

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