Being in front.Of or pertaining to the forehead or frons, or to the bone of the forehead: as, the frontal crest of a bird; frontal plates of a reptile.In entomology See clypeal suture, under clypeal.n. Something worn on the forehead or face; a frontlet.n. Something that comes or is situated in front; a front piece or part, as (formerly) the valance of a bed.n. Specifically In heraldry: The front of anything, as of a helmet or a cap.n. The forehead, as of a human head, used as a bearing.n. In architecture, a little pediment or frontispiece over a small door or window.n. Eccles.: A movable cover or hanging for the front of an altar.n. In England, in the middle ages, also a movable cover of wood or precious metal for the front of the altar. Such a frontal was sometimes called a table (also tabula, tablementum).n. In medicine, a medicament or preparation to be applied to the forehead.n. In anatomy and zoology, the frontal bone; the bone of the forehead.