frontal

(noun) an adornment worn on the forehead. Synonyms: frontlet.

(noun) a drapery that covers the front of an altar.

(noun) the face or front of a building. Synonyms: facade, frontage.

(adj) belonging to the front part. Examples: "A frontal appendage."

(adj) of or relating to the front of an advancing mass of air. Examples: "Frontal rainfall."

(adj) meeting front to front. Synonyms: head-on. Examples: "A frontal attack." "A head-on collision."

(adj) of or adjacent to the forehead or frontal bone. Examples: "The frontal lobes."