\ 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 But what struck us most is Quinn's ace in the hole. Kirkland Crawford, Detroit Free Press, "Detroit Lions plan to have IT guy in Winnebago in Bob Quinn's driveway during NFL draft," 21 Apr. 2020 Later the Eagles rode Williams, who had two huge aces on the way to serving out the game. Pat Lammer, sun-sentinel.com, "Bates, Williams help power Calvary Christian over King’s in 3A," 29 Oct. 2019 Even though the teams are tied 2-2, the Astros have aces Gerrit Cole and Justin Verlander on the mound for Games 5 and 6. Steve Gardner, USA TODAY, "Astros back in World Series thanks to rookie pitcher José Urquidy's big start," 27 Oct. 2019 Dennis-Yarmouth 3, Greater New Bedford 1 — Sophomore Lucy Swanson had 6 aces, 21 kills and 24 digs for the Dolphins (17-2). BostonGlobe.com, "Catholic schools lose realignment appeal - The Boston Globe," 25 Oct. 2019 The Astros have three Cy Young Award-winning aces: Cole, Justin Verlander and Zack Greinke, all of whom threw more than 200 innings and won between 18 and 21 games this season. Michael Powell, New York Times, "Astros Play the Long Game, and So Far It’s Working," 16 Oct. 2019 Charley Drain, Northridge: Had 11 aces, 57 assists and 12 digs in three matches. Dennis Victory, al, "Vote for the Central Alabama volleyball Player of the Week ending Oct. 12," 16 Oct. 2019 Lydia Grote had 11 kills and Natalie Hooper had five aces for Burroughs (13-4, 10-0 in league). Burbank Leader, "Leader Sports Roundup: Providence girls’ volleyball sweeps Flintridge Prep," 3 Oct. 2019 Bublik had 25 aces against his American opponent and saved four of five break points to advance to the Round of 16. San Diego Union-Tribune, "Bublik upsets Fritz at Chengdu Open; Kyrgios loses in Zhuhai," 25 Sep. 2019 Recent Examples on the Web: Verb The team includes someone in his 20s and others in their 30s and 40s, who ace the pop culture of now. Los Angeles Times, "Older does not equal expendable. We need to act in a way that protects our elders from coronavirus," 9 May 2020 Stock up on on this plush paper that aced the Good Housekeeping Institute Textiles Lab’s rigorous tests and is sure to please family members and guests alike. Nicole Saporita, Good Housekeeping, "GH Seal Spotlight: Charmin Ultra Soft Bath Tissue," 21 Apr. 2020 Many of the numbers seem stuck between advancing story or character development and delivering a knockout routine that could ace a TV dance competition. Brian Seibert, New York Times, "‘Beyond Babel’ Review: A Fence Separates Star-Crossed Lovers," 2 Feb. 2020 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

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

1 Jun 2020

Cite this Entry

“Ace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ace. Accessed 4 Jun. 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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