(finance, banking) A credit facility under which a bank or other lender agrees to provide a client with loans of money up to an approved limit during a predefined period. The client may borrow the entire credit amount all at once or in portions during the specified period.

(mathematics) A line that graphically represents the real numbers as a series of points whose distance from an origin is proportional to their value

A firm stance or policy on which one will not compromise

(idiomatic, often used attributively) The worst or lowest quality on the market, especially among a range of products.

(IRC) The line in an IRCd configuration file that records the hostname of a banned user

(transitive, IRC) To ban a user from a server

(mathematics) The real number system, viewed as a line.

(rail transport) A secondary railroad route or one subsidiary to a railroad's mainlines.

(military) The Distant Early Warning Line, a series of radar stations, located north of the Arctic Circle and extending from Alaska to Baffin Island, operated by American and Canadian authorities from the late 1950s to the early 1990s to help protect North America by detecting incoming hostile missiles and aircraft.

Misspelling of deadline.