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Definition: link

(1) In communications, a line, channel or circuit over which data are transmitted.

(2) An address that points to a Web page or other file (image, video, PDF, etc.) on a Web server. Links reside on Web pages, in email messages and word processing documents as well as any other document type that supports hypertext and URL addressing. See URL and hypertext.

(3) In data management, a pointer embedded within a record that refers to data or the location of data in another record.

(4) In programming, a call to another program or subroutine.