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Ar

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  1. Arabic.
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Ar

Symbol, Chemistry.
  1. argon.
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AR

  1. annual return.
  2. Arkansas (approved especially for use with zip code).
  3. Army Regulation; Army Regulations.
  4. augmented reality.
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ar-

  1. variant of ad- before r: arrear.
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-ar1

  1. variant of the adjective-forming suffix -al1, joined to words in which an l precedes the suffix: circular; lunar; singular.
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Origin of -ar1

< Latin -āris; replacing Middle English -er < Anglo-French, Old French < Latin -āris

-ar2

  1. variant of -er2, often under the influence of a spelling with -ar- in a cognate Latin noun: burglar; cellar; collar; mortar; poplar; scholar; vicar; vinegar.
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-ar3

  1. variant of -er1 on the model of -ar2, used in the formation of nouns of agency: liar; beggar.
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ar.

  1. arrival.
  2. arrive; arrives.
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Ar.

A/R

or a/r

  1. account receivable.
  2. accounts receivable.
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a.r.

  1. Insurance. all risks.
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A.R.

  1. annual return.
  2. Army Regulation; Army Regulations.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for ar

ar

the internet domain name for
  1. Argentina
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Ar

the chemical symbol for
  1. argon
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AR

abbreviation for
  1. Arkansas
  2. Autonomous Region
  3. Also: A/R (in the US and Canada) accounts receivable
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Ar.

abbreviation for
  1. Arabia(n)
  2. Also: Ar Arabic
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a.r.

abbreviation for
  1. anno regni
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Word Origin

Latin: in the year of the reign

-ar

suffix forming adjectives
  1. of; belonging to; likelinear; polar; minuscular
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Word Origin

via Old French -er from Latin -āris, replacing -ālis (-al 1) after stems ending in l
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 ar

-ar

word-formation element meaning "pertaining to, of the nature of," from Latin -arem, -aris "of the kind of, belonging to," a secondary form of -alis, dissimilated for used after syllables with an -l- (e.g. insularis for *insulalis, stellaris for *stellalis).

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Online Etymology Dictionary, © 2010 Douglas Harper

ar in Medicine

Ar

  1. The symbol for the elementargon

ar in Science

Ar

argon

[ärgŏn′]
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.