In this Ordinance, unless the context otherwise requires— A.B. means an able-bodied seaman […] Section 2(1), Merchant Shipping (Seafarers) Ordinance (Cap. 478)
(abbreviation, alt-of, countable, initialism, uncountable) Initialism of afterburner.
AB-89 would have required that participation in sex-segregated California school programs, athletic teams, and facility use be based on a pupil’s sex, not gender identity. 2025 April 1, FOX26 News Staff, “Both transgender athlete bills fail in California”, in FOX26 News:
(countable, uncountable) A blood type of the ABO system that has both blood antigens and may receive all blood types, and donate to AB.
(countable) A blood type of the ABO system that has both blood antigens and may receive all blood types, and donate to AB. ▸ A person with this blood type.
(abbreviation, alt-of, countable, initialism, uncountable) Initialism of adult baby.
Well, he appears to be an AB. You know, an adult baby. It's a fetish in which the baby is taken care of in every way by a mommy or a daddy. 2002 October 3, Dee Johnson, “Dead Again” (at 23:18–23:27 from the start), in Richard Thorpe, director, ER, season 9, episode 2, spoken by Michael Gallant (Sharif Atkins):
(abbreviation, alt-of, countable, initialism, uncountable) Initialism of asymmetric bars.
Shares of AB InBev (BUD) soared nearly 6% after the Budweiser, Bud Light and Stella Artois owner reported solid sales and earnings. 2019 July 25, Paul R. La Monica, “Good news for the king of beer: People are drinking more”, in CNN Business: