means A device that slowly rotates meat on a horizontal spit over or beside a heat source so it cooks evenly and self-bastes, or a shop or restaurant built around such cooking.

from From French rôtisserie, the place or trade of the rôtisseur — the roaster — built on rôtir, "to roast," which traces back through Old French to a Germanic root (a cousin of the same family that gave English "roast"). The French passed it whole into English, spit, drippings, and all.