\ 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 Hebert ran to the rail when the ace came, looked skyward and wept. Ramon Antonio Vargas | Staff Writer, NOLA.com, "Covington man wins $1.5 million poker event for 'my No. 1 fan,' his late mother," 30 Dec. 2020 But the Chicago Cubs ace seemed bewildered to find out he will be traded to the San Diego Padres in a seven-player deal via Twitter and not from either team. Mark Gonzales, chicagotribune.com, "Yu Darvish learns of his impending trade from the Chicago Cubs to the San Diego Padres via Twitter: ‘What kind of system is it?’," 28 Dec. 2020 Blake Snell's controversial early removal from Game 6 of the World Series will apparently be the ace's final appearance with the Tampa Bay Rays. Jace Evans, USA TODAY, "San Diego Padres to acquire 2018 Cy Young Award winner Blake Snell from Tampa Bay Rays," 28 Dec. 2020 The Tampa Bay Rays are finalizing a deal to trade ace left-hander Blake Snell to the Padres, per multiple reports late Sunday. orlandosentinel.com, "Tampa Bay Rays dealing ace lefty Blake Snell to San Diego," 28 Dec. 2020 And what about that ace of spades found on the U.N. chief’s body—a signal, an omen or just an incongruity? Edward Kosner, WSJ, "‘The Golden Thread’ Review: Who Killed Dag Hammarskjöld?," 21 Dec. 2020 Becerra’s likely ascension to Washington does more than just take him out of the Senate horse ace. Julia Wick, Los Angeles Times, "Essential California: Filling that Senate seat," 11 Dec. 2020 Amy Olson struck the first ace of the day on the 16th hole from 139 yards with an 8-iron. Later in the day, Yu Jin Sung holed hers on the 5th from 169 yards with a 5-iron, sparking wild celebrations from both her and her caddy. Calum Trenaman, CNN, "Two holes-in-one scored during first round of the US Women's Open," 11 Dec. 2020 Chavez is also the fleet six-string ace in the house band for the annual Blues Caravan tours, which are produced by Germany’s Ruf Records and crisscross the European continent. George Varga, San Diego Union-Tribune, "Faces of the arts shutdown: Laura Chavez: ‘This is the first time I have ever busked in my life’," 15 Nov. 2020 Recent Examples on the Web: Verb The Lions waived safety/special teams ace Jayron Kearse earlier this week, in part to take a look at some of the younger defensive backs on their roster. Dave Birkett, Detroit Free Press, "Detroit Lions activate DT Danny Shelton from injured reserve, sign S Bobby Price," 2 Jan. 2021 Rather than put in Hill – who excels as a gadget-play passer, special teams ace, receiver and running back – Payton slotted in backup Jameis Winston. Lorenzo Reyes, USA TODAY, "NFL Week 10 winners, losers: Time to add Arizona Cardinals QB Kyler Murray to MVP debate," 16 Nov. 2020 In normal times, the swim test acts as a rite of passage for new MIT recruits, ensuring students better known for their brains can also ace aquatics. Jem Bartholomew, WSJ, "School Went Online This Year, Including MIT’s Swimming Test," 29 Dec. 2020 Others tried to ace it, flying through emails and spreadsheets. Alexis Soloski, New York Times, "‘Temping’ Is a Workplace Drama for One. You’re Hired.," 20 Oct. 2020 New York Yankees ace Gerrit Cole got off the team bus Thursday afternoon, walked into the visitor’s clubhouse at Petco Park and had a message for Yankees manager Aaron Boone. Bob Nightengale, USA TODAY, "'We’re going to win it:' Yankees confident with ace Gerrit Cole on mound for Game 5 of the ALDS vs. Rays," 9 Oct. 2020 Hill, a fourth-year vet, has never started a game and in his multi-faceted duty – quarterback, option quarterback, runner, receiver, special teams ace – has never thrown more than two passes in a game. Jarrett Bell, USA TODAY, "Opinion: Eagles' Carson Wentz, playing in Cleveland, isn't inspiring remorse among Browns fans," 21 Nov. 2020 The Lions ruled special teams ace Miles Killebrew out for Sunday's game for personal reasons not related to COVID-19. Dave Birkett, Detroit Free Press, "Detroit Lions activate RB Bo Scarbrough, CB Mike Ford from injured reserve," 24 Oct. 2020 Wilson is a reliable reserve safety who is also a special teams ace. Tyler Dragon, The Enquirer, "Analysis: Projecting the Cincinnati Bengals' 53-man roster ahead of the NFL deadline," 4 Sep. 2020

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

19 Jan 2021

Cite this Entry

“Ace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ace. Accessed 26 Jan. 2021.

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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

Nglish: Translation of ace for Spanish Speakers

Britannica English: Translation of ace for Arabic Speakers

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