\ 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
plural aces

Definition of ace (Entry 4 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 5 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

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 Wilson, who is a three-year letterman, finished her senior campaign with 363 kills, 282 digs, 46 aces, and 13 assists. Marcus Gutierrez, Houston Chronicle, "Volleyball: Summer Creek’s Wilson inks commitment to Dallas area JUCO," 12 May 2020 Arizona Republic The Arizona Cardinals didn't ace the NFL draft, according to grades from NFL pundits. Jeremy Cluff, azcentral, "Arizona Cardinals receive rave reviews for 2020 NFL draft selections," 27 Apr. 2020 Trevor Bauer remains a viable ace, and the Sonny Gray breakout was no fluke. Paul Daugherty, Cincinnati.com, "Doc's Morning Line: UC Bearcats, Xavier Musketeers have plenty of work to do before March," 4 Feb. 2020 The incentive, started by Australian Nick Kyrgios who agreed to give $200 (140 USD) for every ace, has been running throughout the buildup tournaments with a number of players getting involved, along with Tennis Australia and the WTA. George Ramsay, CNN, "Australian Open: Nadal, Djokovic, Federer lead men's draw, Serena eyes record-equaling 24th grand slam," 18 Jan. 2020 West Ham star and fellow defensive midfielder Declan Rice became the latest admire of the Brazilian ace, recently heralding him as the best in the world in his position. SI.com, "Why Liverpool's Fabinho Is Simply the Best Defensive Midfielder in the Business Right Now," 2 Oct. 2019 Down two runs to Yankees ace Gerrit Cole on Wednesday afternoon, Cameron Maybin hit a grand slam to power the Virtual Tigers to a 6-3 win at Yankee Stadium. Anthony Fenech, Detroit Free Press, "How Detroit Tigers' Victor Reyes can carve out playing time; grand slam beats Yanks," 29 Apr. 2020 Those legal proceedings officially kicked off today, and the couple—no surprise—have an ace legal team working with them, per HELLO!. Katherine J Igoe, Marie Claire, "One of Meghan Markle and Prince Harry's Lawyers Represented Princess Diana, Too," 25 Apr. 2020 An Ohio-class submarine at sea is America’s ace in the hole, ensuring that hundreds of nuclear warheads can survive a surprise nuclear attack on the U.S. The idea is that this strategy deters an enemy from launching an attack in the first place. Kyle Mizokami, Popular Mechanics, "Quantum Communication Could Make U.S. Subs Even More Deadly," 22 Apr. 2020 Recent Examples on the Web: Verb All tasks an exoskeleton would be expected to ace if the technology were supporting a disabled person in the real world. John Brant, Popular Mechanics, "At the Bionic Olympics, Engineers and Athletes Make Miracles," 27 Apr. 2020 The James Webb Space Telescope, set to launch in 2021, just aced a critical dress rehearsal. Popular Mechanics, "NASA's James Webb Telescope Spreads Its Reflective Wings for the First Time," 2 Apr. 2020 If Friday was an audition for the American League Division Series, Urquidy aced it. Chandler Rome, Houston Chronicle, "Astros secure home-field advantage through ALCS," 28 Sep. 2019 Tagovailoa aced his critical three-month check-up earlier this month. Mike Rodak | Mrodak@al.com, al, "Tua Tagovailoa expected to be cleared March 9, hold pro day April 9," 25 Feb. 2020 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

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

Noun (2)

2008, in the meaning defined above

Adjective (2)

2009, 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

18 May 2020

Cite this Entry

“Ace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ace. Accessed 26 May. 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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