ar

noun1

1. •
   The name of the Latin script letter R/r.

   • All the ars in the inscription.

noun1

1. •
   Abbreviation of argent.

noun19

1. •
   An AR-15 personal semi-automatic rifle, M-16 assault rifle, M-4 carbine, derivative or related gun; the Armalite AR family and derivatives.
2. •
   Initialism of augmented reality.

   • (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) — 2020
3. •
   (informal) An assault rifle or automatic rifle.
4. •
   Abbreviation of Arkansas: a state of the United States.
5. •
   [plural only] Initialism of accounts receivable.
6. •
   Initialism of aspect ratio.
7. •
   (slang) Initialism of alternate reality.
8. •
   Initialism of androgen receptor.
9. •
   Initialism of armed robbery.
10. •
    Initialism of artificial respiration.
11. •
    Initialism of atmospheric river.
12. •
    (US) Initialism of American record, national record for the United States.
13. •
    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. — 1984
14. •
    Initialism of age regression.
15. •
    Initialism of acknowledgment of receipt.
16. •
    Initialism of aerial refueling.
17. •
    Abbreviation of Arunachal Pradesh: a state of India.
18. •
    Initialism of area record, best achievement among those by persons from a given continent.
19. •
    Initialism of assembly resolution.

adjective1

1. •
   Initialism of autoregressive.