(mathematics) The branch of mathematics that deals with vectors, vector spaces, linear transformations and systems of linear equations. / (algebra) an associative algebra

Someone who fits a lining to something. / A removable cover or lining / The pamphlet which is contained inside an album of music or movie

A large passenger-carrying ship, especially one on a regular route; an ocean liner. / (nautical) A ship of the line. / (baseball) A line drive. / (marketing, slang) A basic salesperson.

(geometry) The two supplementary adjacent angles formed by two intersecting lines

A short joke, especially one of a single sentence. / A short remark intended as a sound bite. / (computing) A command or small program consisting of a single line of input.

(US, law and law enforcement) a physical or photographic queue of people allegedly involved in a crime, allowing a witness to identify them

(American football) The defensive players who are in position behind the defensive linemen and in front of the safeties and cornerbacks and whose principal responsibilities are to tackle runners and to defend against shorter passes.

Any distinctive shape or line, etc. / A distinctive feature that characterizes something, especially the parts of the face of an individual.

Commentary or supplemental information, usually printed on the back of the cover or in an insert, of recorded media; such as record albums, CDs, videos, or DVDs.

The chief, senior or most authoritative of a group of linesmen officiating at a match.