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AR15

noun
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\ ˈāˈär(ˈ)fif¦tēn \
variants: or AR15 rifle
plural -s

Definition of AR15

: a . 223 caliber gas-operated semiautomatic rifle that is essentially a civilian version of the M16

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First Known Use of AR15

1963, in the meaning defined above

History and Etymology for AR15

from Armalite, the manufacturer

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Dictionary Entries near AR15

Ar

AR

-ar

AR15

Arab

araba

Arabella

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Cite this Entry

“AR15.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/AR15. Accessed 28 Feb. 2021.

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