frontal (Adjective) — Belonging to the front part. ex. "a frontal appendage"
frontal (Adjective) — (meteorology) of or relating to the front of an advancing mass of air. ex. "frontal rainfall"
frontal (Adjective) — Meeting front to front. ex. "a frontal attack"
frontal (Adjective) — Of or adjacent to the forehead or frontal bone. ex. "the frontal lobes"
frontal (Noun) — An adornment worn on the forehead.
frontal (Noun) — A drapery that covers the front of an altar.
frontal (Noun) — The face or front of a building.