(idiomatic, informal) A thing which serves to attract or summon something.

A sign language based on American Sign Language (ASL) and English.

A certain Catalan-based sign language, used predominantly in Catalonia and Barcelona.

A hand gesture in which the index and little finger are extended while the middle and ring fingers are held down with the thumb, having various meanings across cultures, and sometimes signifying cuckoldry or associated with heavy metal music.

(electronics, technology) The use of digital processing, such as by computers or more specialized digital signal processors, to perform a wide variety of signal processing operations.

(informal) An interpretation sign.

A public sign at a historical site, nature reserve, etc., that provides information, facts, and figures for the benefit of visitors.

A sign language commonly used in Sweden.