n (countable) The part of the body of an animal or human which contains the brain, mouth(,) and main sense organs.
n The end of a rectangular table furthest from the entrance; traditionally considered a seat of honor.
n (anatomy) The rounded part of a bone fitting into a depression in another bone to form a ball-and-socket joint.
n (linguistics) A morpheme that determines the category of a compound or the word that determines the syntactic type of the phrase of which it is a member.
n (automotive) The cylinder head, a platform above the cylinders in an internal combustion engine, containing the valves and spark plugs.
n (fluid dynamics) The difference in elevation between two points in a column of fluid, and the resulting pressure of the fluid at the lower point.