Definition of frontals:
(adj) :
Of, relating to, directed toward, or situated at the front.
(adj) :
Directed against the front or at the main point or issue.
(adj) :
(meteorology) Of or relating to a weather front.
(adj) :
(anatomy) Of or relating to the forehead or frontal bone.
(adj) :
(anatomy) Parallel to the main axis of the body and at right angles to the sagittal plane.
(n) :
(architecture) The façade of a building.