The head of a creature. This section of the body generally contains the brain and trauma to this area is often either very bloody or very dangerous (and sometimes both).
The Head in the SCA
A legal target for archers and heavy fighters. If you do not believe a blow to the head is decent enough to penetrate your assumed armour, then it is called "light". If you believe it is a good blow, you call "good head" and fall dead to the ground. This is one of those times where mundane language definitions differ greatly in meaning to society uses.