a shoulder firearm with spiral grooves cut in the inner surface of the gun barrel to give the bullet a rotatory motion and thus a more precise trajectory.
2.
one of the grooves.
3.
a cannon with such grooves.
4.
(often initial capital letter) rifles, any of certain military units or bodies equipped with rifles.
verb (used with object)
5.
to cut spiral grooves within (a gun barrel, pipe, etc.).
6.
to propel (a ball) at high speed, as by throwing or hitting with a bat.
Origin: 1745–55; < Low German rīfeln to groove, derivative of rīve, riefe groove, flute, furrow; akin to Old English rifelede wrinkled