1
a
: 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
6
a
: a person who excels at something
a computer ace
b
: the best pitcher on a baseball team
the ace of the staff
aced; acing
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
4
a
: 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
: of first or high rank or quality
an ace mechanic
: 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
Taryn Deoilers
—used for a bandage with elastic properties
1
American Council on Education
2
ˌā-(ˌ)sē-ˈē 
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
Harvard Medical Health LetterSynonyms
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.
Adjective (1)
an ace computer programmer
Recent Examples on the Web
Thomas G. Moukawsher, Newsweek, 5 Nov. 2024
In addition to those five regulars, ace starting pitcher Spencer Strider needed season-ending elbow surgery after two starts.
—Dan Schlossberg, Forbes, 1 Nov. 2024
Esther K. Choy, Forbes, 3 Nov. 2024
The device has aced real-world tests, producing as much as 3.67 L (15.5 US cups) of fresh water per day per m2 of material.
—Michael Irving, New Atlas, 1 Nov. 2024
Rolling Stone, 10 Aug. 2023
And that number doesn’t include C.J. Goodwin who is a special teams ace, but plays corner in a pinch.
—David Moore, Dallas News, 5 June 2023
See all Example Sentences for ace 
Examples are automatically compiled from online sources to
show current usage.
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Noun
On Saturday morning, it was reported that Yankees ace Gerrit Cole would be opting out of the remainder of his $324 million contract with the Yankees.
—Thomas G. Moukawsher, Newsweek, 5 Nov. 2024
In addition to those five regulars, ace starting pitcher Spencer Strider needed season-ending elbow surgery after two starts.
—Dan Schlossberg, Forbes, 1 Nov. 2024
Verb
Use these 3 tips to prepare leadership stories and ace your performance review.
—Esther K. Choy, Forbes, 3 Nov. 2024
The device has aced real-world tests, producing as much as 3.67 L (15.5 US cups) of fresh water per day per m2 of material.
—Michael Irving, New Atlas, 1 Nov. 2024
Adjective
Joining him were a band of equally ace musicians with Windy City roots, including guitarist Isaiah Sharkey, bassist Junius Paul, keyboardist Andrew Toombs, and drummer Brandon Collins.
—Rolling Stone, 10 Aug. 2023
And that number doesn’t include C.J. Goodwin who is a special teams ace, but plays corner in a pinch.
—David Moore, Dallas News, 5 June 2023
See all Example Sentences for ace
Articles Related to ace
Dictionary Entries Near ace
Cite this Entry
“Ace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ace. Accessed 28 Nov. 2024.
Copy CitationKids Definition
ace
1 of 3 noun1
: a playing card with one large figure in its center
2
: a very small amount or degree
within an ace of winning
3
: a point scored on a serve (as in tennis) that an opponent fails to touch
4
: a golf hole made in one stroke
5
a
: a combat pilot who has shot down at least five enemy airplanes
b
: a person who is expert at something
ace
2 of 3 verb
aced; acing
1
: to score an ace against
the tennis player aced her opponent
2
: to earn the grade of A on (an examination)
ace
3 of 3 adjective
: of first or high rank or quality
Medical Definition
Ace
1 of 2 trademark
—used for a bandage with elastic properties
ACE
2 of 2 abbreviationLove words? Need even more definitions?
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