From WordNet (r) 2.0 (August 2003) [wn]:
grille
n 1: small opening (like a window in a door) through which
business can be transacted [syn: wicket, lattice]
2: grating that admits cooling air to car's radiator [syn:
radiator grille]
3: a framework of metal bars used as a partition or a grate;
"he cooked hamburgers on the grill" [syn: grill,
grillwork]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Grille \Grille\, a. [F. See Grill, v. t.]
A lattice or grating.
[1913 Webster]
The grille which formed part of the gate. --L.
Oliphant.
[1913 Webster]