adjective (1)
\ ˌȯl-ˈin \

Definition of all-in 

(Entry 1 of 2)

1 chiefly British : all-inclusive
2 chiefly British : being almost without restrictions all-in wrestling

all in

adjective (2)
variants: or less commonly all-in \ ˌȯl-​ˈin \

Definition of all in (Entry 2 of 2)

1 : tired, exhausted Atticus said as tactfully as he could that he just didn't think he could stand a pageant tonight, he was all in.— Harper Lee Inside, the invalid had gone to bed; her mother said, "She was all in," and expressed pity for her, for the first time.— Edna O'Brien
2 : fully committed to or involved in something The Diamondbacks are all-in for this year. It's why they brought in J. D. Martinez at the trade deadline. They have a healthy mix of young and veteran players, and they're looking to make a run this October.— Kevin Skiver often used in the phrase go all in With my bonus in tow, I got the far-fetched idea I didn't feel like working that type of pace anymore. So I went all in on real estate on my own.— Philip Michael

Note: In poker, to go all in is to bet everything on a hand.

The best my opponent could have at this point was a 5-high straight, so I went all in—my full $220,000 was riding on this hand. The last card was a Jack—and I was out.— John Rochowski

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Examples of all-in in a Sentence

Adjective (2)

was all in after an evening of dancing and partying

Recent Examples on the Web: Adjective

Even more difficult than dealing with serious substance abuse issues is having to do it all in the public eye. Sarah Jacoby, SELF, "Amanda Bynes Says Her Drug Use Made Her a 'Completely Different Person'," 27 Nov. 2018 One promising approach is to spread out the essential genes across the bacteria’s entire genome, rather than clustering them all in one place. Jonathon Keats, Discover Magazine, "Bacteria That Eat Drugs Could Help Solve the Antibiotic Resistance Crisis," 8 Nov. 2018 The restaurant empire, founded by chef David Chang, has been exalted by critics and beloved by diners since Momofuku Noodle Bar began it all in NYC’s East Village in 2004. Kelly Dobkin, Bon Appetit, "The Well-Crafted Kitchen: Inside the New Momofuku Ko Bar," 5 June 2018 Really go all in by picking a rose piece to bedeck every open space of skin: Wrists, necks, ear lobes, and fingers can all be made rosy. Leah Melby Clinton, Marie Claire, "How to Make Your Boring LBD Feel New Again," 16 Nov. 2018 After paring back the intensity of her her Royal Tour schedule, the Duchess of Sussex is going all in on ease and simplicity—at least with her fashion choices. Chloe Foussianes, Town & Country, "Meghan Markle Stepped Out in an Affordable, Eco-Friendly Dress on the Royal Tour of Australia," 22 Oct. 2018 Dontnod, on the other hand, is really going all in. Megan Farokhmanesh, The Verge, "Life is Strange 2 puts politics at its forefront," 28 Sep. 2018 Republican groups have gone all in on Balderson, worried what another upset special election loss will mean for their chances in November. Tara Golshan, Vox, "Republicans ran their emergency playbook in OH-12: culture wars over tax cuts," 7 Aug. 2018 With so little separating her from Bryce, Myers went all in on character. David Weigel, Washington Post, "In Wisconsin, a Democratic star finds himself in a primary brawl," 9 July 2018

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

Adjective (1)

1890, in the meaning defined at sense 1

Adjective (2)

1901, in the meaning defined at sense 1

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Time Traveler for all-in

The first known use of all-in was in 1890

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English Language Learners Definition of all-in

: very tired

: allowing almost any technique or method

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