head

noun
The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.
A thing resembling a head either in form or in relation to a whole.
The front, forward, or upper part or end of something.
A person in charge of something; a director or leader. (the head of the Dutch Catholic Church)
A person considered as a numerical unit. (they paid fifty dollars a head)
A component in an audio, video, or information system by which information is transferred from an electrical signal to the recording medium, or vice versa.
A body of water kept at a particular height in order to provide a supply at sufficient pressure. (an 8 m head of water in the shafts)
A toilet or bathroom on a boat or ship. (they were cleaning out the heads)
The word that governs all the other words in a phrase in which it is used, having the same grammatical function as the whole phrase.
A superficial deposit of rock fragments, formed at the edge of an ice sheet by repeated freezing and thawing and then moved downhill. (Larger-scale climatic changes or tectonic changes in the hinterland produce relative changes in the main agents of deposition and entrenchment of the upper fan (the fan head).)

adjective
Chief; principal. (the head waiter)