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1. Be in connection with something relevant
   "This ties in closely with his earlier remarks"
    
2. Make a logical or causal connection
   "I cannot tie in these events at all";
   - associate, relate, link, colligate, link up, connect

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

Derived forms: tying in, tie-ins, tied in, ties in

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

Encyclopedia: Tie-in