Third-person singular simple present indicative form of line up one's ducks

plural of high-voltage transmission line

(basketball) An arc on the floor of a basketball court beyond which a successful shot is worth three points.

(basketball) A line parallel to the baseline, fifteen feet from the plane of the backboard, from behind which a free throw may be taken.

(basketball) The line parallel to the end lines and midway between them.

An imaginary line on the Earth's surface at 180° longitude, mostly through the Pacific Ocean, to the east of which the calendar date is one day earlier than to the west.

(American football) The scrimmage line on the offensive side of the football field. / (American football) Offensive line.

Alternative letter-case form of Mason-Dixon Line

(nautical, military, obsolete) A ship of the line or battleship.

(historical) The boundary line between Pennsylvania and Maryland, as run (1764–1767) by Charles Mason and Jeremiah Dixon, that, before abolition, defined part of the northern boundary of states in which slavery was permitted.