\ ˈās How to pronounce ace (audio) \

Definition of ace

 (Entry 1 of 7)

1a : a die face marked with one spot
b : a playing card marked in its center with one pip
c : a domino end marked with one spot
2 : a very small amount or degree : particle
3 : a point scored especially on a service (as in tennis or handball) that an opponent fails to touch
4 : a golf score of one stroke on a hole also : a hole made in one stroke
5 : a combat pilot who has brought down at least five enemy airplanes
6a : a person who excels at something a computer ace
b : the best pitcher on a baseball team the ace of the staff
ace in the hole
1 : an ace dealt face down to a player (as in stud poker) and not exposed until the showdown
2 : an effective and decisive argument or resource held in reserve
within an ace of
: on the point of : very near to came within an ace of winning


aced; acing

Definition of ace (Entry 2 of 7)

transitive verb

1 : to score an ace against (an opponent)
2 : to make (a hole in golf) in one stroke
3 : to gain a decisive advantage over : defeat usually used with out
4a : to earn a high grade on (something, such as an examination) especially : to get an A on
b : to perform extremely well in he aced every subject

Definition of ace (Entry 3 of 7)

: of first or high rank or quality an ace mechanic

Definition of ace (Entry 4 of 7)

: asexual But ace individuals often still feel romantic attraction toward others, as well as a drive to cultivate intimate, loving relationships—just without an intrinsic interest in pursuing the sexual aspect.— Taryn Deoilers
plural aces

Definition of ace (Entry 5 of 7)

: an asexual person (see asexual sense 3b) Like many other aces and aros, I grew up thinking I was broken. I was 19 before I heard the words "asexual" or "aromantic," before I found out that there were other people in the world like me.— Mikayla Micomonaco

Definition of Ace (Entry 6 of 7)

used for a bandage with elastic properties

Definition of ACE (Entry 7 of 7)

1 American Council on Education
2 \ ˌā-​(ˌ)sē-​ˈē How to pronounce ACE (audio) , ˈās-​ \ angiotensin converting enzyme The ACE inhibitors are designer molecules developed specifically to attach to their target enzyme and prevent it from activating angiotensin. Virtually the only thing these drugs do in the body is to interact with ACE. However, ACE is not a very specific enzyme; it acts on hormones besides angiotensin.Harvard Medical Health Letter

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Examples of ace in a Sentence

Noun (1) She won the match by scoring more than 30 aces. took a few lessons with a tennis ace to improve his backhand Verb She aced her entrance exams. He aced his annual physical. He aced his opponent on the last point of the match.
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Recent Examples on the Web: Noun Finau posted a 54-hole total of 16-under 197 and one stroke better than Webb Simpson, whose 64 on Saturday included an ace at the 196-yard 12th hole. Adam Schupak, Golfweek, "Tony Finau shoots 62, takes Phoenix Open lead with 'most enjoyable round of my career'," 1 Feb. 2020 Nestor posted 49 assists while MacLellan added a pair of service aces and Jocelyn Carter contributed eight block assists. Joe Noga, cleveland, "Gilmour volleyball’s Division II state tournament run ends in 5-set semifinal loss to Bishop Fenwick," 8 Nov. 2019 Schoen was credited with seven victories in the air earning him the title of ace. Dawn Mitchell, Indianapolis Star, "Retro Indy: Indianapolis flying ace Karl Schoen killed in one of WWI's greatest dogfights," 7 Nov. 2019 Astros first baseman Yuli Gurriel had launched a moon shot into the left-field stands and Zack Greinke, one of the Astros’ trio of aces, was methodically working a one-hitter. Michael Powell, New York Times, "For Astros in the World Series, a Surprising Hook and a Sudden Fall," 31 Oct. 2019 Urquidy neutralized a Nationals lineup like none of the three Astros aces who preceded him. Chandler Rome, Houston Chronicle, "Astros blast Nationals in Game 4 to level World Series," 26 Oct. 2019 Heavily favored at the start, the 107-win Astros will try to get even tonight when Justin Verlander faces Stephen Strasburg in another matchup of aces. Los Angeles Times, "The Sports Report: Clippers win round one against the Lakers," 23 Oct. 2019 Heavily favored at the start, the 107-win Astros will try to get even Wednesday night when Verlander faces Stephen Strasburg in another matchup of aces. Ben Walker, The Denver Post, "Soto, Nationals top Cole, Astros 5-4 in World Series opener," 22 Oct. 2019 But a pair of aces from Maggie Jameson and a kill from Mao down the stretch locked the second-set victory. Burbank Leader, "Providence girls’ volleyball suffers league sweep against Pasadena Poly," 17 Sep. 2019 Recent Examples on the Web: Verb Suddenly, computers can do things that seemed impossible not so many years ago, from mastering the game of Go and acing Atari games to translating text and recognizing images. Alison Gopnik, WSJ, "Curiosity Is a New Power in Artificial Intelligence," 4 May 2018 But Billerica aced the annual Krystle Campbell Tournament, topping Arlington Catholic, 3-2, in the semifinals April 15. Matt Case, BostonGlobe.com, "In Billerica, a band of softball sisters," 20 Apr. 2018 The Yankees gave $324 million to ace free-agent pitcher Gerrit Cole alone. Gregory Zuckerman, WSJ, "Hedge-Fund Billionaire’s Deal for Mets Teeters Near Collapse," 6 Feb. 2020 From squishing the bug with their back foot to level swings, the kids appeared to ace their pop quizzes. Robert Avery, Houston Chronicle, "On final two days of December, youth baseball comes out of hibernation," 31 Dec. 2019 Photographer: Jacobia Dahm/Bloomberg One of Europe’s most powerful female regulators is expected to ace an interview for a job that will equip her with greater weaponry to take on the Silicon Valley giants that already fear her. Natalia Drozdiak, Bloomberg.com, "Tech Giants Brace as Vestager 2.0 Gets EU Power Upgrade," 7 Oct. 2019 Two stoners get into Harvard University after magic marijuana enables them to ace their tests. Los Angeles Times, "Movies on TV this week: Sunday, Sept. 22, 2019," 22 Sep. 2019 Brad Hamann, a 2004 Butler grad, Butler-Tarkington resident and Indianapolis real estate agent aced the 8th hole at Saddlebrook Golf Club Monday afternoon. Dana Hunsinger Benbow, Indianapolis Star, "Albatross! Butler grad makes par 4 hole-in-one at Indy golf course," 16 Aug. 2019 Pelicans' draft picks shine: The Pelicans appeared to have aced this draft. Jeff Zillgitt, USA TODAY, "Key takeaways from the NBA's Summer League in Las Vegas," 16 July 2019

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

Noun (1)

14th century, in the meaning defined at sense 1a


1923, in the meaning defined at sense 1

Adjective (1)

1926, in the meaning defined above

Adjective (2)

2009, in the meaning defined above

Noun (2)

2008, in the meaning defined above

History and Etymology for ace

Noun (1)

Middle English as, borrowed from Anglo-French, going back to Latin ass-, ās "copper money piece (at first a pound, but progressively reduced to a half-ounce), pound unit of weight, unit," of uncertain origin

Note: The word ās has been compared within Latin to asser "wooden beam, pole, post" (generalized from a plural asserēs, from a singular *assis?) and assis, axis (by hypercorrection?) "plank, board," though any relationship is far from certain. A loanword from Etruscan?

Adjective (1)

derivative of ace entry 1

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Time Traveler for ace

Time Traveler

The first known use of ace was in the 14th century

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Statistics for ace

Last Updated

23 Mar 2020

Cite this Entry

“Ace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ace. Accessed 1 Apr. 2020.

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More Definitions for ace



English Language Learners Definition of ace

US, informal : to earn a very high grade on (an examination) : to get a grade of A on (an examination) : to perform very well on (a test or challenge)
: to score an ace against (an opponent in tennis)
US : to score an ace on (a hole in golf)


\ ˈās How to pronounce ace (audio) \

Kids Definition of ace

 (Entry 1 of 2)

1 : a playing card with one figure in its center
2 : expert entry 2 a flying ace

Kids Definition of ace (Entry 2 of 2)

: of the very best kind an ace reporter
\ ˈās How to pronounce Ace (audio) \

Medical Definition of Ace

 (Entry 1 of 2)

used for a bandage with elastic properties

Medical Definition of ACE (Entry 2 of 2)

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More from Merriam-Webster on ace

Thesaurus: All synonyms and antonyms for ace

Rhyming Dictionary: Words that rhyme with ace

Spanish Central: Translation of ace

Nglish: Translation of ace for Spanish Speakers

Britannica English: Translation of ace for Arabic Speakers

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