1
chiefly British
: including everything : all-inclusive
the all-in price/cost/rate
While the face value of the [rail pass] ticket is pounds 128, it works out far cheaper to buy an all-in package which includes your flights.—Suzy Jagger
2
chiefly British
: being almost without restrictions
all-in wrestling
variants
or less commonly all-in
1
: tired, exhausted entry 1
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 team is all-in for a championship bid this year.
—often used in the phrase go all inWith 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 Grochowski
Cite this Entry
“All-in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/all-in. Accessed 4 Oct. 2026.
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