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 Mets have been targeting a return around the All-Star break for their ace, who hasn’t pitched since last July 7. Steve Gardner, USA TODAY, 14 June 2022 And now the Beavers are one win away from elimination, facing a red-hot team and an uncertain situation with their ace. Joe Freeman, oregonlive, 12 June 2022 Saving their ace in case of a Game 2, Oklahoma offered sophomore Nicole May and freshman Jordy Bahl in the first game. Los Angeles Times, 6 June 2022 Jones could go to Rylee Carter (8-0) to give teams different looks and keep opposing batters from getting a bead on his ace. Jonathan Saxon, The Courier-Journal, 3 June 2022 Hall is the sixth seed in Class LL and its ace, Sophie Garner-MacKinnon, will play at Duke next season. Shreyas Laddha, Hartford Courant, 28 May 2022 Outside of its ace, University School lost 125 innings pitched from last season to graduation. Matt Goul, cleveland, 25 May 2022 With last week’s legal filings, Tree Farm’s lawyers also turned over what seems to be their ace in the hole in the form of a 2019 declaration signed by the land’s previous owner, an elderly Park City entrepreneur named Ira Sachs. Brian Maffly, The Salt Lake Tribune, 17 May 2022 Phoenix Northwest Christian coach Bobby Howry, a former Major League Baseball pitcher, knows how to get the ball in the hands of his ace in the end. Richard Obert, The Arizona Republic, 16 May 2022 Recent Examples on the Web: Verb Brandon Drury and Tommy Pham hit back-to-back doubles, and Kyle Farmer drove Pham in on a single to left field against Cardinals ace Adam Wainwright. Charlie Goldsmith, The Enquirer, 11 June 2022 That’s what Orioles ace John Means posted Saturday afternoon, confirming the worst-case scenario with a succinct update on his impending elbow reconstruction surgery. Andy Kostka, Baltimore Sun, 24 Apr. 2022 There hasn’t been one thrown since Seattle Mariners ace Felix Hernandez in 2012. Bob Nightengale, USA TODAY, 15 Apr. 2022 Another winter payroll purge resulted in the trades of franchise cornerstones Matt Olson and Matt Chapman and ace Chris Bassitt and the departures of outfielder Mark Canha and long-time manager Bob Melvin. Mike Digiovannastaff Writer, Los Angeles Times, 6 Apr. 2022 The Lions signed special teams ace C.J. Moore to a one-year extension worth up to $2.4 million, NFL Network reported Sunday. Dave Birkett, Detroit Free Press, 13 Mar. 2022 Use this 4-week plan to build the endurance needed to ace Diaz’s test. Michael Easter, Men's Health, 7 Mar. 2022 This is a mailbag first getting a question from former Bears player and special teams ace Brendon Ayanbadejo, a three-time Pro Bowl selection. Brad Biggs,, 5 Jan. 2022 Second-year owner Steve Cohen committed $254.5 million to ace Max Scherzer, infielder Eduardo Escobar and outfielders Starling Marte and Mark Canha before rosters froze when ownership locked out the players on Dec. 2. Jake Seiner,, 21 Dec. 2021 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, 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 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

24 Jun 2022

Cite this Entry

“Ace.” Dictionary, Merriam-Webster, Accessed 28 Jun. 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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