Alternative form of blur the line.

(idiomatic, often followed by between) To minimize or erode the distinction between two things.

plural of breast line

(differential geometry) Synonym of tangent (“straight line touching a curve at a single point without crossing it there”).

(nautical, military) A type of warship formation with the ships proceeding side-by-side on parallel tracks.

(nautical, military) A type of warship formation with the ships proceeding one after another and the trailing ships following behind the lead ship on the same path.

(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.