frontal

an adornment worn on the forehead

a drapery that covers the front of an altar

the face or front of a building

belonging to the front part; "a frontal appendage"

of or relating to the front of an advancing mass of air; "frontal rainfall"

meeting front to front; "a frontal attack"; "a head-on collision"

of or adjacent to the forehead or frontal bone; "the frontal lobes"