Definitions from Wiktionary ( )

▸ noun:  The upper portion of a page (or other) layout.
▸ noun:  Text, or other visual information, used to mark off a quantity of text, often titling or summarizing it.
▸ noun:  Text, or other visual information, that goes at the top of a column of information in a table.
▸ noun:  (informal) A font, text style, or typesetting used for any of the above.
▸ noun:  (computing) The first part of a file or record that describes its contents.
▸ noun:  (networking) the first part of a packet or stream, often containing its address and descriptors.
▸ noun:  (masonry) A brick that is laid sideways (on its largest face), for example at the top of a wall or within the brickwork, with its smallest side showing (oriented so that that side is wider than it is tall).
▸ noun:  A horizontal structural or finish piece over an opening.
▸ noun:  A machine that separates and gathers the heads of grain etc.
▸ noun:  (soccer) The act of hitting the ball with the head.
▸ noun:  (soccer) Someone who heads the ball.
▸ noun:  A headlong fall, jump or dive.
▸ noun:  A raised tank that supplies water at constant pressure, especially to a central heating and hot water system.
▸ noun:  A pipe which connects several smaller pipes.
▸ noun:  The rodeo performer who drives the steer toward the heeler to be tied.
▸ noun:  One who puts a head on something.
▸ verb:  (sports, transitive) To strike (a ball) with one's head.
▸ noun:  (programming) Clipping of header file. [(programming) A file, usually in the form of source code, that is automatically included in another source file by the compiler.]

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