Definition of rifler in US English:

rifler

(also rifeler)

noun

  • A robber, a plunderer, a looter.

noun

  • Rifleman. Now rare.

Origin

Middle English. Probably partly (in early use) from Anglo-Norman ryflour, Middle French rifleur, riffleur robber, thief, and partly from rifle + -er. Compare post-classical Latin riflator, rifliator, riflerius (after 1341 in a British source)<br>late 18th century. From rifle + -er. Compare earlier rifleman.