about
: the 11th month of the civil year or the 5th month of the ecclesiastical year in the Jewish calendar see Months of the Principal Calendars Table
: the one of the four ABO blood groups characterized by the presence of antigens designated by the letters A and B and by the absence of antibodies against these antigens
1
able seaman; able-bodied seaman
2
abort; abortion
3
airborne
4
airman basic
5
Alberta
6
[New Latin artium baccalaureus]
bachelor of arts
: from : away : off
abaxial
Examples of ab in a Sentence
Recent Examples on the Web
Danielle Zickl, SELF, 24 Apr. 2025
These moves all strengthen muscles on the front of your body, including the chest, abs and hip flexors, without addressing muscles on the back of your body that help support upright posture, such as the mid back, glutes and hamstrings.
—Dana Santas, CNN Money, 18 Apr. 2025
Pierre, 30, shared a shirtless selfie on his Instagram Stories of him posing with his abs on display in front of a bathroom mirror.
—Raven Brunner, People.com, 14 Apr. 2025
The Spider-Man actor was seen on set just one day after his costar Matt Damon was photographed sporting an impressive beard and toned abs while filming scenes for the movie in Favignana, Italy.
—Tommy McArdle, People.com, 27 Mar. 2025
See All Example Sentences for ab
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Noun
So no, doing core exercises in the gym won’t guarantee you visible abs.
—Danielle Zickl, SELF, 24 Apr. 2025
These moves all strengthen muscles on the front of your body, including the chest, abs and hip flexors, without addressing muscles on the back of your body that help support upright posture, such as the mid back, glutes and hamstrings.
—Dana Santas, CNN Money, 18 Apr. 2025
Pierre, 30, shared a shirtless selfie on his Instagram Stories of him posing with his abs on display in front of a bathroom mirror.
—Raven Brunner, People.com, 14 Apr. 2025
The Spider-Man actor was seen on set just one day after his costar Matt Damon was photographed sporting an impressive beard and toned abs while filming scenes for the movie in Favignana, Italy.
—Tommy McArdle, People.com, 27 Mar. 2025
See All Example Sentences for ab
Cite this Entry
“Ab.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ab. Accessed 29 Apr. 2025.
Copy CitationMedical Definition
ab
2 of 4 abbreviation1
or AB
abort; abortion
2
about
AB
3 of 4 noun
: the one of the four ABO blood groups characterized by the presence of antigens designated by the letters A and B and by the absence of antibodies against these antigens
AB
4 of 4 abbreviation1
aid to blind
2
[Latin artium baccalaureus]
bachelor of arts
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