From WordNet (r) 3.0 (2006) [wn]:
restaurant
n 1: a building where people go to eat [syn: restaurant,
eating house, eating place, eatery]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Restaurant \Res"tau*rant\ (r?s"t?*r?nt;277), n. [F., fr.
restaurer. See Restore.]
An eating house.
[1913 Webster]