1. tie in - Noun
2. tie in - Verb
make a logical or causal connection
be in connection with something relevant
Source: WordNettie-in
People will tie in with a fanatic if for no other reason than to break the monotony of their lives. Mark Clifton
They know they got the TV ad, they know they got the name recognition, they know that they can do a tie in with McDonald's or some fast food outlet and the money is just gonna flow in. Gene Siskel
Prentice: It's a fascinating theory, sir, and cleverly put together. Does it tie in with known facts? Rance: That need not cause us undue anxiety. Civilizations have been founded and maintained on theories which refused to obey facts. Joe Orton
I never wore a tie voluntarily, even though I was forced to wear one for photos when I was young and for official events at school. I used to wrap my tie in a newspaper, and whenever the teacher checked I would quickly put it on again. I'm not used to it. Most Bolivians don't wear ties. Evo Morales
I cannot connect these two pieces of evidence in my mind Source: Internet
colligate these facts Source: Internet