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

AB

1. Abbreviation ofAlberta, a province ofCanada.

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

2. Initialism ofArtium baccalaureus.
3. Initialism ofAryan Brotherhood, aUSwhite supremacist,neo-Nazi prison gang and crimesyndicate.

   Synonym:12

AB (countable anduncountable,pluralABs)

1. Initialism ofable seaman;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 ofafterburner.
3. Initialism ofaid to theblind.
4. (military,aviation)Initialism ofairbase.
5. (organic chemistry)Abbreviation ofalkylbenzene.

   Hyponym:LAB

6. (medicine)Initialism ofantibody.
7. Initialism ofartificialbreeding.
8. (law,politics)Initialism ofassemblybill.
   • 2025 April 1, FOX26 News Staff, “Both transgender athlete bills fail in California”, inFOX26 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. Ablood type of theABOsystem that has both bloodantigens 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 ofadult baby.
11. Initialism ofasymmetric bars.
12. (Australia, Adelaide,countable) Ahalal snack pack consisting of doner meat topped with chips, tomato sauce, chilli sauce, barbecue sauce, and garlic sauce.

AB (notcomparable)

1. Initialism ofairborne.
2. Initialism ofantiballistic.
3. (baseball)Initialism ofat bat.

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

• -ba-,B. A.,B.A.,BA,Ba,ba,ba'

From the first two letters of theEnglish alphabetA andB.

AB

1. (Hong Kong Cantonese)twoseparate (instances)

   分ABteam返工[Cantonese]  ― fan¹ei¹ bi¹ tim¹ faan¹ gung¹[Jyutping]  ―  to go to work separated into two teams (i.e. each team goes to work on alternative days)

   行ABteam[Cantonese]  ― haang⁴ei¹ bi¹ tim¹[Jyutping]  ―  to install an "AB team" system

   分AB組／分AB组[Cantonese]  ― fan¹ei¹ bi¹ zou²[Jyutping]  ―  to separate into two groups

• ABC

AB ?

1. Initialism ofagriculture biologique.

• Audio:

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AB m

1. Abbreviation ofAnrufbeantworter.
2. (apartment listing)Abbreviation ofAltbau.

• IPA^(key):/ˈabe/

AB (pluralAB-AB)

1. (finance,government,management)Initialism ofanggaran belanja.
2. Initialism ofarah benar.
3. (military)Initialism ofangkatan bersenjata.
4. (business,management)Initialism ofadministrasi bisnis.
5. (hematology)AB

• “AB” inKamus 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 ofakcinė bendrovė

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

AB (pluralAB-AB)

1. (biology) TheAB blood type.
2. Initialism ofanggaran belanja(“expense estimate”).

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

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

AB

1. Abbreviation ofAlba, acounty inRomania.

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

• IPA^(key):/ˈɑːbeː/

• Audio(Småland):

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AB

1. the blood typeAB
2. Abbreviation ofaktiebolag. (corporation; stockcompany; public limited company)

• ba

AB

1. the blood typeAB

AB

1. (politics)Initialism ofAvrupa Birliği(European Union)