grill

A grating; a grid of wire or a sheet of material with a pattern of holes or slots, usually used to protect something while allowing the passage of air and liquids. Typical uses: to allow air through a fan while preventing fingers or objects from passing; to allow people to talk to somebody, while preventing attack.

On a vehicle, a slotted cover as above, to protect and hide the radiator, while admitting air to cool it.

A cooking device comprising a source of radiative heat and a means of holding food under it; a broiler in US English

A cooking device comprising a source of radiative and convective heat and a means of holding food above it; a barbecue.