(idiomatic) A clear distinction in the context of a legal or moral judgment.

(American football, Canadian football) The five players comprising the center, the left and right offensive guards, and the left and right offensive tackles who are positioned around the ball at the line of scrimmage.

(stockbreeding) Breeding by a certain family line of descent, especially in the selection of the dam or mother.

Gold foil having a lining of another metal.

Engraving in which the effects are produced by lines of different width and closeness, cut with the burin upon copper or similar material; also, a plate so engraved.

(military) That portion of a theater of war] which an army passes over in attaining its object.

(geology) A line in the plane of a stratum, or part of a stratum, perpendicular to its intersection with a horizontal plane; the line of greatest inclination of a stratum to the horizon

(military) Arrangement of troops for marching. / (military) Course or direction taken by an army or body of troops in marching.

(nautical) A wooden tub in which the tow-line carried by a whaleboat is coiled.

(military, weaponry) direction in which a weapon fires / (figuratively, by extension) position vulnerable to attack