In rugby, the line at the end of the pitch past, or on, which the ball must be placed to score a try

(nautical) An imaginary line between two objects that can be used to chart a safe course in a difficult situation.

(rail transport, US) alternative form of shortline. / see also short and line for other senses.

(architecture) Alternative form of spring line

(American football) The points on the football field needed to pass to convert a first down.

(US) To jump the line.

(complex analysis, analytic geometry) A 1-dimensional affine subspace of a vector space over the complex numbers.

(projective geometry) A line that includes a point at infinity; a line in a projective space; a projective space of dimension 1.

A fisherman that uses a line baited with hooks

plural of line fisher