\ ˈās How to pronounce ace (audio) \

Definition of ace

 (Entry 1 of 6)

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 6)

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


adjective (1)

Definition of ace (Entry 3 of 6)

: of first or high rank or quality an ace mechanic


adjective (2)

Definition of ace (Entry 4 of 6)

: 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 5 of 6)

used for a bandage with elastic properties

Definition of ACE (Entry 6 of 6)

1 American Council on Education
2 \ ˌā-​(ˌ)sē-​ˈē How to pronounce ˌā-(ˌ)sē-ˈē (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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Other Words from ace

Adjective (2)

ace noun, plural aces
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

Examples of ace in a Sentence


She won the match by scoring more than 30 aces. took a few lessons with a tennis ace to improve his backhand


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

Our society is quick to shame and misunderstand people on the ace spectrum. Corinne Werder, Allure, "The Shame-Free Guide to Hypoactive Sexual Desire Disorder," 23 May 2019 In shale-patch poker match, though, Berkshire’s investment could become Occidental Chief Executive Vicki Hollub’s ace. ... Lauren Silva Laughlin, WSJ, "Warren Buffett Helps Occidental Raise Anadarko Ante, but at Steep Price," 30 Apr. 2019 There are few if any aces on the trade market this summer, but even someone like veteran Blue Jays lefty J.A. Happ would go a long way toward stabilizing the rotation for a pennant run. Staff,, "Midseason Roundtable: The SI Staff Makes Some Second-Half Predictions," 11 July 2018 The ace is likely to make at least one minor league start before returning, Roberts said. Greg Beacham, The Seattle Times, "Kelly’s hit ends D-backs’ 13-inning win over Dodgers, 5-4," 30 Mar. 2019 In deciding to start Aaron Nola on regular rest Saturday rather than pushing him back to Sunday, manager Gabe Kapler left open the possibility that the Phillies ace could pitch in the All-Star Game. Scott Lauber,, "Phillies' Maikel Franco making a play to stay | Extra Innings," 12 July 2018 The ace turned his day around, as Hahn added three birdies to finish 3-under 67 for the day and 6-under heading into the final round. Christopher Hanna,, "James Hahn Turns Things Around With Ace On 11," 23 June 2018 The San Francisco Giants ace broke the little finger on his pitching hand when fielding a comebacker in spring training. Mark Billingsley, sacbee, "How Bumgarner and his little finger showed big progress in Sacramento rehab start | The Sacramento Bee," 26 May 2018 The Mets ace entered Wednesday on an 0-for-21 streak when facing hitters with runners in scoring position. Clark Spencer, miamiherald, "Marlins stage ninth-inning rally to defeat Mets, 2-1 | Miami Herald," 23 May 2018

Recent Examples on the Web: Verb

The Giants are motivated to help Bochy add to his illustrious résumé, but unlike many in the home dugout at Oracle Park, Bochy is not attempting to ace a job interview. Kerry Crowley, The Mercury News, "2019 Giants not embracing ‘Nothing to lose’ mentality (at least so far)," 12 June 2019 Just reserve them for once or twice a week as a reward for things like acing that big presentation or making it through the longest Monday ever—and stick with a single serving. Marygrace Taylor, Woman's Day, "4 Heart-Healthy Diet Changes Every Woman Should Make," 1 May 2019 Lexi Thompson also shot 72, acing the 166-yard sixth hole with an 8-iron., "Tiger Woods settles for a 70 using new putter," 29 June 2018 The show sunk to a near record-low 32.9 million viewers last year when Moonlight (domestic box-office: $27.9 million) aced out La La Land after that infamous envelope mix-up. Gary Levin, USA TODAY, "Oscars 2018: Jimmy Kimmel is secretly hoping for another 'Envelope-gate'," 27 Feb. 2018 Sophie competes on the local gymnastics team, aces her spelling tests, goes on loads of play- dates, and loves to download songs for her iPod. Jennifer Rabiner*, Redbook, ""Why Don't I Like My Own Child?"," 10 Nov. 2016 Under the current system, applicants must ace the famously difficult Specialized High School Admissions Test. Leslie Brody, WSJ, "Stuyvesant, Other Elite New York Public High Schools Could Admit Students Who Didn’t Pass State Tests," 18 Oct. 2018 The Tesla Model 3 has aced its first crash tests, scoring five stars across the board on the National Highway Traffic Safety Administration’s assessment. Fox News, "Tesla Model 3 gets five star rating in NHTSA crash tests," 21 Sep. 2018 Oliveira has shared four key tips for acing the online vintage hunt. Bianca Nieves, Glamour, "Passport Vintage Is Fashion People's Best-Kept Secret for Vintage Denim," 21 Aug. 2018

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


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

History and Etymology for ace


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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Learn More about ace

Dictionary Entries near ace


accustom oneself to






Statistics for ace

Last Updated

2 Jun 2019

Look-up Popularity

Time Traveler for ace

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

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More Definitions for ace



English Language Learners Definition of ace

 (Entry 1 of 2)

: a playing card with one large figure in its center that can be the card with either the highest or lowest value
: a person who is very skilled at something
: a point scored on a serve that an opponent fails to hit in tennis



English Language Learners Definition of ace (Entry 2 of 2)

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

Rhyming Dictionary: Words that rhyme with ace

Thesaurus: All synonyms and antonyms for ace

Spanish Central: Translation of ace

Nglish: Translation of ace for Spanish Speakers

Britannica English: Translation of ace for Arabic Speakers

Comments on ace

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showing courage and determination

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