(n) :
a
rack; 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