ar

adj

1. (abbreviation, alt-of, initialism, not-comparable)Initialism of autoregressive.

noun

1. (countable)An AR-15 personal semi-automatic rifle, M-16 assault rifle, M-4 carbine, derivative or related gun; the Armalite AR family and derivatives.

   “In its August 2003 issue, while the ban was still in effect, Guns & Ammo ran a feature story titled “Stoner’s ‘Black Rifle’ Marches On,” subtitled “The basic AR platform has been refined, improved, upgraded, power-boosted and accurized.””

2. (countable, informal)An assault rifle or automatic rifle.
3. (abbreviation, alt-of, initialism, plural, plural-only, uncountable)Initialism of accounts receivable.
4. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of acknowledgment of receipt.
5. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of age regression.
6. (abbreviation, alt-of, initialism, uncountable)Initialism of augmented reality.

   “Near-synonyms: MR, mixed reality, spatial computing, CPS, cyber-physical system”

   “(Cover started out as a company in the AR and VR business, but moved into the virtual talent sector; Ichikara is a startup designed to support their virtual talent)”

7. (abbreviation, alt-of, countable, initialism, slang, uncountable)Initialism of alternate reality.
8. (US, abbreviation, alt-of, countable, initialism)Initialism of American record, national record for the United States.
9. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of administrative rule or administrative regulation.

   “As I was going over the AR book for my status change, I read several other ARs I believed the institution was violating so I decided to ask about them at the meeting.”

10. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of androgen receptor.
11. (abbreviation, alt-of, countable, initialism)Initialism of area record, best achievement among those by persons from a given continent.
12. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of armed robbery.
13. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of artificial respiration.
14. (abbreviation, alt-of, countable, initialism)Initialism of aspect ratio.
15. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of assembly resolution.
16. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of atmospheric river.
17. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of aerial refueling.
18. The name of the Latin script letter R/r.

    “All the ars in the inscription.”

    “I have drunk en-ee-cee-tee-ay-ar from the ef-ell-oh-doubleyou-ee-ar-ess in his gee-ay-ar-dee-ee-en many a time.”

    “RV [is spoken] as "ar-vee" instead of "I SPELL Romeo Victor".”

19. (alt-of)Alternative letter-case form of ar.

name

1. (abbreviation, alt-of)Abbreviation of Arkansas: a state of the United States.
2. (abbreviation, alt-of)Abbreviation of Arunachal Pradesh: a state of India.
3. (abbreviation, alt-of)Abbreviation of American Revolution

intj

1. (UK, West-Country, West-Midlands, alt-of, alternative)Alternative form of arr.

particle

1. (UK, West-Country, West-Midlands, alt-of, alternative)Alternative form of arr.
2. (Manglish, Singlish, alt-of, alternative)Alternative form of ah (question particle).

verb

1. (alt-of, obsolete)Obsolete spelling of are.

   “But commonlie, the fairest bodies, ar bestowed on the foulest purposes.”