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AP

or A.P.

See more synonyms on Thesaurus.com
  1. adjective phrase.
  2. Trademark. Advanced Placement Program.
  3. Air Police.
  4. American plan.
  5. antipersonnel.

ap-1

  1. variant of ad- before p: appear.

ap-2

  1. variant of apo- before a vowel or h: aphelion.

Ap.

  1. Apostle.
  2. Apothecaries'.
  3. April.

a.p.

  1. additional premium.
  2. author's proof.

A/P

or a/p

  1. account paid.
  2. accounts payable.
  3. authority to pay or purchase.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for ap

ap

prefix
  1. son of: occurring as part of some surnames of Welsh originap Thomas

Word Origin

from Welsh mab son

AP

abbreviation for
  1. Air Police
  2. Associated Press

ap-

prefix
  1. a variant of apo- aphelion

a.p.

abbreviation for
  1. obsolete (in prescriptions, etc) ante prandium

Word Origin

Latin: before a meal
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 ap

AP

abbreviation of Associated Press, first recorded 1879; the organization was founded May 1848 as co-operative news gathering effort among New York City newspaper publishers covering the war with Mexico.

ap-

2

patronymic prefix in Welsh names, earlier map "son," cognate with Gaelic mac. Since 17c. merged into surnames (Ap Rhys = Price, Ap Evan = Bevan, etc.).

It is said that a Welshman who evidently was not willing to be surpassed in length of pedigree, when making out his genealogical tree, wrote near the middle of his long array of 'aps' -- "about this time Adam was born." ["Origin and Significance of our Names," "The Chautauquan," Oct. 1887-July 1888]

ap-

1

form of Latin ad- before words beginning in -p-; see ad-.

Online Etymology Dictionary, © 2010 Douglas Harper

ap in Medicine

ap.

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