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
Kayti Burt, Time, 21 Aug. 2025
The mother-of-three bared her abs while wearing a tiny leopard print triangle top with a pair of cheeky bottoms.
—Tracy Wright, FOXNews.com, 11 Aug. 2025
Pro tip: Keep your hips low to engage the abs rather than bouncing.
To target your lower back, glutes, and shoulders, supermans are a great choice, said Hribick.
—Sherri Gordon, Health, 4 Aug. 2025
Nikki Bella shows off her abs in a casual green two piece top and jeans at the Happy Gilmore 2 New York Premiere on July 21.
—Alexandra Schonfeld, People.com, 24 July 2025
See All Example Sentences for ab
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Noun
The abs shift to corns-on-the-cob, and then to popping popcorn when (in a not unprecedented K-pop scenario) a button flies off of Abby’s shirt, revealing more skin.
—Kayti Burt, Time, 21 Aug. 2025
The mother-of-three bared her abs while wearing a tiny leopard print triangle top with a pair of cheeky bottoms.
—Tracy Wright, FOXNews.com, 11 Aug. 2025
Pro tip: Keep your hips low to engage the abs rather than bouncing.
To target your lower back, glutes, and shoulders, supermans are a great choice, said Hribick.
—Sherri Gordon, Health, 4 Aug. 2025
Nikki Bella shows off her abs in a casual green two piece top and jeans at the Happy Gilmore 2 New York Premiere on July 21.
—Alexandra Schonfeld, People.com, 24 July 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 25 Aug. 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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