n. The skull of a human being, or, as now-used, of any animal; the bones of the head, collectively.n. More exactly, the brain-box; the bony case of the encephalon, as distinguished from those bones of the skull which support the face and jaws. See cranial.n. In entomology, the integument of an insect's head excluding the antennæ, eyes, and oral apparatus, and including the epicranium, gula, and occiput.