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Ab

[ahb, ahv]
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noun
  1. Av.
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Ab

Symbol.
  1. Chemistry. alabamine.
  2. Immunology. antibody.
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AB

  1. Nautical. able seaman.
  2. airborne.
  3. U.S. Air Force. Airman Basic.
  4. Alberta, Canada (approved for postal use).
  5. antiballistic; antiballistic missile.
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AB

Symbol, Physiology.
  1. a major blood group usually enabling a person whose blood is of this type to donate blood to persons of type AB and to receive blood from persons of type O, A, B, or AB.
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Compare ABO system.

abs

[abz]
plural noun Informal.
  1. abdominal muscles.
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Origin of abs

An Americanism dating back to 1980–85; by shortening

ab.

  1. about.
  2. Baseball. (times) at bat.
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ab-

  1. a formal element occurring in loanwords from Latin, where it meant “away from”: abdicate; abolition.
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Also a-, abs-.

Origin of ab-

< Latin ab (preposition and prefix) from, away, cognate with Greek apó, Sanskrit ápa, German ab, English of1, off

A.B.1

Origin of A.B.1

< New Latin, Medieval Latin Artium Baccalaureus

A.B.2

  1. Nautical. able seaman.
  2. Baseball. (times) at bat.Also a.b.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ab

Contemporary Examples

Historical Examples

  • A character mentioned in the Mabinogion, goes by the name of Gwyddneu ab Llwydau.

    Y Gododin

    Aneurin

  • Arthwys son of Ceneu ab Coel was too early for the battle of Cattraeth.

    Y Gododin

    Aneurin

  • Sabbataï had been born on the ninth of Ab—on the great Black Fast.

  • Ab, you are in as big a hurry to git thar as any of us,” said another.

    Rodney, the Ranger

    John V. Lane

  • Wal, sir, I've heerd yer from the North, and I'd like to know if yer an ab'lishener.

    Among the Pines

    James R. Gilmore


British Dictionary definitions for ab

Ab

noun
  1. a variant of Av
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AB

abbreviation for
  1. Also: a.b. able-bodied seaman
  2. (in the US) Bachelor of Arts
  3. (esp in postal addresses) Alberta (Canada)
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symbol for
  1. a human blood type of the ABO group, containing both the A antigen and the B antigen
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ab-1

prefix
  1. away from; off; outside of; opposite toabnormal; abaxial; aboral
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Word Origin

from Latin ab away from

ab-2

prefix
  1. denoting a cgs unit of measurement in the electromagnetic systemabvolt
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Word Origin

abstracted from absolute

abs

pl n
  1. informal abdominal muscles
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ABS

abbreviation for
  1. acrylonitrile-butadiene-styrene: any of a range of tough copolymers used esp for making moulded articles
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ab

ab-

word-forming element meaning "away, from, from off, down;" from Latin ab-, ab "off, away from," from PIE root *apo- (see apo-). Reduced to a- before -m-, -p-, or -v-; sometimes abs- before -c- or -t-.

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abs

n.

colloquial shortening of abdominals, by 1992.

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Online Etymology Dictionary, © 2010 Douglas Harper

ab in Medicine

Ab

abbr.
  1. antibody
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.