A grille (French word from Latin craticula, small grill)'s an opening of several slits side by side in a wall or metal sheet or other barrier, usually to let air or water enter and/or leave but keep larger objects including people and animals in or out. In the United States, it's often misspelled grill, a closely related word. In powered vehicles In automotive engineering, a grille covers an opening in the body of a vehicle to allow air to enter. Most vehicles feature a grille at the front of t… (More on Grille)