leader

One who goes first.

One having authority to direct.

One who leads a political party or group of elected party members; sometimes used in titles.

A person or organization that leads in a certain field in terms of excellence, success, etc.

(music) A performer who leads a band, choir, or a section of an orchestra.

(music, UK) The first violin in a symphony orchestra; the concertmaster.

The dominant animal in a pack of animals, such as wolves or lions.

an animal placed in advance of others, especially on a team of horse, oxen, or dogs

Either of the two front horses of a team of four in front of a carriage.

(botany) A fast-growing terminal shoot of a woody plant.

A pipe for conducting rain water from a roof to a cistern or to the ground.

(UK, journalism) The first, or the principal, editorial article in a newspaper; a leading or main editorial article; a lead story.

(fishing) A section of line between the main fishing line and the snell of a hook, intended to be more resistant to bites and harder for a fish to detect than the main fishing line.

(film, printing) A piece of material at the beginning or end of a reel or roll to allow the material to be threaded or fed onto something, as a reel of film onto a projector or a roll of paper onto a rotary printing press.

(cinematography, dated) An intertitle.

(marketing) A loss leader or a popular product sold at a normal price.

(printing) A type having a dot or short row of dots upon its face.

(printing, in the plural) A row of dots, periods, or hyphens, used in tables of contents, etc., to lead the eye across a space to the right word or number.

(fishing) A net for leading fish into a pound, weir, etc.

(mining) A branch or small vein, not important in itself, but indicating the proximity of a better one.

(nautical) A block of hard wood pierced with suitable holes for leading ropes in their proper places.

(engineering) The drive wheel in any kind of machinery.

(meteorology) The path taken by electrons from a cloud to ground level, determining the shape of a bolt of lightning.