(countable) A noun "head" represents the part of the body containing the brain, mouth, and main sense organs in animals and humans, as well as various forms related to mental or emotional aptitude, mind, headache, headdress, and an individual person in people, and can also refer to a single animal, the population of game, or the antlers of a deer in animals.

(countable) A noun "head" represents various forms such as the topmost or leading part, the end of a table or pool table, the principal operative part of a machine or tool, the foam on top of carbonated beverages, the end cap of a pressure vessel or cask, the uppermost part of a valley, deposits near the top of a geological succession, a headline in journalism, the end of an abscess, the headstock of a guitar, the leading component of a sail or the bow of a vessel, and a headland in britain.

(social, countable, metonymically) A leader, expert, or person in a position of command, often referring to someone in a place of honor or as a chief or mastermind, and can also refer to a headmaster or headmistress, or a person with extensive knowledge of hip hop.

A noun "head" represents various meanings such as a significant or important part, a beginning or end, a protuberance, the source of a river, a clump of seeds, leaves or flowers, the rounded part of a bone, the toilet of a ship, and tiles laid at the eaves of a house, as well as a component in jazz music or linguistics that refers to the principal melody or theme of a piece or a morpheme that determines the category of a compound or the word that determines the syntactic type of the phrase it is a part of.

Headway; progress.

Topic; subject.

(only in the singular) Denouement; crisis.

(fluid dynamics) A noun "head" represents the buildup of fluid pressure, the difference in elevation between two points in a column of fluid, and the energy in a mass of fluid divided by its weight.

(slang, uncountable) Fellatio or cunnilingus; oral sex.

(slang) The glans penis.

(slang, countable) A heavy or habitual user of illicit drugs.

(transitive) To be in command of. (See also head up.)

(transitive) To come at the beginning or front of; to commence.

(transitive) To strike with the head; as in soccer, to head the ball

(intransitive) To move in a specified direction.

(fishing) To remove the head from a fish.

(intransitive) To originate; to spring; to have its course, as a river.

(intransitive) To form a head.

(transitive) To form a head to; to fit or furnish with a head.

(transitive) To cut off the top of; to lop off.

To go in front of.

To get in the front of, so as to hinder or stop; to oppose.

(by extension) To check or restrain.

To set on the head.

Of, relating to, or intended for the head.

Foremost in rank or importance.

Placed at the top or the front.

Coming from in front.