1. The communications facilities between adjacent nodes of a network. Synonym telecommunications link. 2. A portion of a circuit connected in tandem with, i.e., in series with, other portions. 3. A radio path between two points, called a radio link. 4. In communications, a general term used to indicate the existence of communications facilities between two points. 5. A conceptual circuit, i.e., logical circuit, between two users of a network, that enables the users to communicate, even when different physical paths are used. Note 1: In all cases, the type of link, such as data link, downlink, duplex link, fiber optic link, line-of-sight link, point-to-point link, radio link and satellite link, should be identified. Note 2: A link may be simplex, half-duplex, or duplex. 6. In a computer program, a part, such as a single instruction or address, that passes control and parameters between separate portions of the program. 7. In hypertext, a logical connection between discrete units of data, or a hypertext connection between Web pages. Synonyms (in this sense) hotlink, hyperlink.