Quick definitions from WordNet (link)

▸ noun:  a fastener that serves to join or link ("The walls are held together with metal links placed in the wet mortar during construction")
▸ noun:  an interconnecting circuit between two or more locations for the purpose of transmitting and receiving data
▸ noun:  (computing) an instruction that connects one part of a program or an element on a list to another program or list
▸ noun:  a unit of length equal to 1/100 of a chain
▸ noun:  the means of connection between things linked in series
▸ noun:  a two-way radio communication system (usually microwave); part of a more extensive telecommunication network
▸ noun:  a channel for communication between groups
▸ noun:  the state of being connected
▸ noun:  a connecting shape
▸ verb:  be or become joined or united or linked ("The travelers linked up again at the airport")
▸ verb:  connect, fasten, or put together two or more pieces ("Link arms")
▸ verb:  link with or as with a yoke
▸ verb:  make a logical or causal connection
▸ name:  A surname (common: 1 in 12500 families; popularity rank in the U.S.: #1605)

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▸ Also see link