Definition of "Frontal" :

noun: the face or front of a building

noun: a drapery that covers the front of an altar

noun: an adornment worn on the forehead

adjective: belonging to the front part

"A frontal appendage."

adjective: of or adjacent to the forehead or frontal bone

"The frontal lobes."

adjective: meeting front to front

"A frontal attack."

adjective: of or relating to the front of an advancing mass of air

"Frontal rainfall."