(idiomatic) To log off; to stop using a computer, radio, etc., especially to stop talking. / (broadcasting) To cease broadcasting a radio or television signal, usually at the end of a broadcasting day.

(arithmetic, informal) A multiplication sign.

(transitive) To transfer (property or rights) to somebody else by signing a document.

(transitive) To add a name to the list of people who are participating in something.

(computing) the attachment of a digital certificate (from a certification authority) to an executable program to ensure its legitimacy

A sign by the side of a road or street, often at an intersection, instructing vehicle drivers to stop.

An illuminated sign constructed from fluorescent lights in the form of bent glass tubes; the different colours being obtained by adding different noble gases to the neon.

(broadcasting) A combination of letters and numbers used to identify a radio or television station.

plural of book signing

(authorship) An event where an author signs copies of her/his books for fans.