noun (1)
\ 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


noun (2)
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

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.
Recent Examples on the Web: Noun The Green Wave’s last state championship came in 2009, when Stephen Perakslis Jr., son of the coach, was the ace. Brendan Kurie,, 14 May 2022 The Louisiana product is also known as an ace recruiter, a big part of Alabama’s effort to land the No. 1 class in 2021 and the No. 2 class in 2022 that wrapped up Wednesday. Carol Robinson |, al, 3 Feb. 2022 Tabbed to try to reorient this wayward organization, Meyer conjured his past as an ace recruiter. New York Times, 26 Apr. 2021 Killings quickly proved to be an asset on the MU bench and also an ace recruiter, helping land top-100 prospects like Symir Torrence and Justin Lewis. Ben Steele, Milwaukee Journal Sentinel, 16 Mar. 2021 Their engagement is the ace in whatever hand our companies are dealt. Rob Catalano, Forbes, 2 May 2022 It’s finally time to recognize that Kershaw is now the ace of a rotation that was once led by Koufax, the cornerstone of group that also includes Don Drysdale, Fernando Valenzuela, Dazzy Vance, Orel Hershiser and Sutton. Bill Plaschke, Los Angeles Times, 30 Apr. 2022 Having Wilmoth out of the bullpen may be the Tigers ultimate ace in the hole. Akeem Glaspie, The Indianapolis Star, 25 Apr. 2022 Keuchel also was the ace of the 2017 staff before the team traded for Justin Verlander in August. Matt Young, Chron, 31 Mar. 2022 Recent Examples on the Web: Verb Orioles ace John Means became the latest, receiving the surgery Wednesday morning in Texas from Dr. Keith Meister. Hayes Gardner, Baltimore Sun, 27 Apr. 2022 The Beavers’ ace left-hander tossed his best and most complete game of the young season, striking out 12 while surrendering just one hit and two walks. Joe Freeman, oregonlive, 18 Mar. 2022 Tuesday night's series opener took another twist, as Yankees ace Gerrit Cole was pulled with two outs in the second inning after throwing 68 pitches. Evan Petzold, Detroit Free Press, 20 Apr. 2022 The Mets ace, in good spirits, traveled to Citi Field for the home opener and to attend the Tom Seaver statue ceremony. Mike Fitzpatrick, Hartford Courant, 15 Apr. 2022 Rafael Devers unloaded a two-run homer off Yankees ace Gerrit Cole in the first inning. Globe Staff,, 8 Apr. 2022 With the two-run blast in the first inning off Yankees ace Gerrit Cole, Semien broke the record set by Davey Johnson of the Atlanta Braves in 1973. Steve Gardner, USA TODAY, 30 Sep. 2021 In their absence, ace left-hander Cooper Hjerpe (3-0, 1.65 ERA) has been dominant, holding opposing hitters to a .203 batting average, and the defense has been near-perfect, flexing a .991 fielding percentage that ranks fourth in the nation. Joe Freeman, oregonlive, 7 Mar. 2022 The executive subcommittee includes several other stars like Mets shortstop Francisco Lindor ($341 million), New York Yankees ace Gerrit Cole ($324 million) and Texas Rangers infielder Marcus Semien ($175 million). Jared Diamond, WSJ, 6 Mar. 2022 Recent Examples on the Web: Adjective An ace American skier who faltered and went home empty-handed. Ted Anthony, ajc, 21 Feb. 2022 An ace American skier who faltered and went home empty-handed. Ted Anthony, ajc, 21 Feb. 2022 An ace American skier who faltered and went home empty-handed. Ted Anthony, ajc, 21 Feb. 2022 An ace American skier who faltered and went home empty-handed. Ted Anthony, ajc, 21 Feb. 2022 An ace American skier who faltered and went home empty-handed. Ted Anthony, ajc, 21 Feb. 2022 An ace American skier who faltered and went home empty-handed. Ted Anthony,, 20 Feb. 2022 An ace American skier who faltered and went home empty-handed. CBS News, 20 Feb. 2022 See More

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.

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

Learn More About ace

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

19 May 2022

Cite this Entry

“Ace.” Dictionary, Merriam-Webster, Accessed 19 May. 2022.

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More Definitions for ace


\ 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)

More from Merriam-Webster on ace

Nglish: Translation of ace for Spanish Speakers

Britannica English: Translation of ace for Arabic Speakers


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