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1. A fastener that serves to join or connect
   "the walls are held together with metal linkups placed in the wet mortar during construction";
   - link, tie, tie-in

1. Be or become joined or united or linked
   "The travellers linked up again at the airport";
   - connect, link, join, unite
    
2. Connect, fasten, or put together two or more pieces
   "Can you link up the two loudspeakers?";
   - connect, link, tie
    
3. Make a logical or causal connection
   "I cannot link up these events at all";
   - associate, tie in, relate, link, colligate, connect

Derived forms: links up, linkups, linking up, linked up

Type of: cerebrate, cogitate, fastener, fastening, fixing, holdfast, think

Encyclopedia: Linkup