AB

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. Particularly: “Is the halal snack pack sense an initialism or other form of shortening?”)

AB

1. Abbreviation of Alberta: a province of Canada.

   Coordinate terms: BC, MB, NB, NL, NS, NT, NU, ON, PE, QC, SK, YT

2. Initialism of Artium baccalaureus.
3. Initialism of Aryan Brotherhood, a US white supremacist, neo-Nazi prison gang and crime syndicate.

   Synonym: 12

AB (countable and uncountable, plural ABs)

1. Initialism of able seaman or able-bodied seaman.
   • Section 2(1), Merchant Shipping (Seafarers) Ordinance (Cap. 478)

     In this Ordinance, unless the context otherwise requires— A.B. means an able-bodied seaman […]

2. Initialism of afterburner.
3. Initialism of aid to the blind.
4. (military, aviation) Initialism of airbase.
5. (organic chemistry) Abbreviation of alkylbenzene.

   Hyponym: LAB

6. (medicine) Initialism of antibody.
7. Initialism of artificial breeding.
8. (law, politics) Initialism of assembly bill.
   • 2025 April 1, FOX26 News Staff, “Both transgender athlete bills fail in California”, in FOX26 News‎^[1]:

     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.

9. A blood type of the ABO system that has both blood antigens and may receive all blood types, and donate to AB.

   Coordinate terms: A, B, O, A+, B+, AB+, O+, A-, B-, AB-, O-

   1. (countable) A person with this blood type.
10. (ABDL) Initialism of adult baby.
11. Initialism of asymmetric bars.
12. (Australia, Adelaide, countable) A halal snack pack consisting of doner meat topped with chips, tomato sauce, chilli sauce, barbecue sauce, and garlic sauce.

AB (not comparable)

1. Initialism of airborne.
2. Initialism of antiballistic.
3. (baseball) Initialism of at bat.

• “AB”, in The American Heritage Dictionary of the English Language, 4th edition, Boston, Mass.: Houghton Mifflin, 2000, →ISBN.
• “AB”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.

• -ba-, B. A., B.A., BA, Ba, ba, ba'

From the first two letters of the English alphabet A and B.

AB

1. (Hong Kong Cantonese) two separate (instances)

   分AB team返工 [Cantonese]  ―  fan¹ ei¹ bi¹ tim¹ faan¹ gung¹ [Jyutping]  ―  to go to work separated into two teams (i.e. each team goes to work on alternative days)

   行AB team [Cantonese]  ―  haang⁴ ei¹ bi¹ tim¹ [Jyutping]  ―  to install an "AB team" system

   分AB組／分AB组 [Cantonese]  ―  fan¹ ei¹ bi¹ zou² [Jyutping]  ―  to separate into two groups

• ABC

AB ?

1. initialism of agriculture biologique

• Audio:

  (file)

AB m

1. abbreviation of Anrufbeantworter
2. (apartment listing) abbreviation of Altbau

• IPA^(key): /ˈabe/

AB (plural AB-AB)

1. (finance, government, management) initialism of anggaran belanja
2. initialism of arah benar
3. (military) initialism of angkatan bersenjata
4. (business, management) initialism of administrasi bisnis
5. (hematology) AB

• “AB” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.

AB f

1. initialism of akcinė bendrovė

• IPA^(key): [e.bi]
• Hyphenation: A‧B
• Rhymes: -bi

AB (plural AB-AB)

1. (biology) The AB blood type.
2. initialism of anggaran belanja (“expense estimate”)

• “AB” in Kamus Dewan Perdana, Kuala Lumpur: Dewan Bahasa dan Pustaka, 2021, →ISBN, page 1.

• “AB” in Pusat Rujukan Persuratan Melayu | Malay Literary Reference Centre, Kuala Lumpur: Dewan Bahasa dan Pustaka, 2017.

AB

1. abbreviation of Alba: a county of Romania

• Ab (Finland Swedish, only in the sense "aktiebolag" below)

• IPA^(key): /ˈɑːbeː/

• Audio (Småland):

  (file)

AB

1. the blood type AB
2. abbreviation of aktiebolag (corporation; stock company; public limited company)

• ba

AB

1. the blood type AB

AB

1. (politics) initialism of Avrupa Birliği (European Union)