Definition of tie-in
(Entry 1 of 2)
1
: something that ties in, relates, or connects especially in a promotional campaign
2
: a book that inspired or was inspired by a motion picture or television program
tie in
verb
tied in; tying in or tieing in; ties in
Definition of tie in (Entry 2 of 2)
: to bring into connection with something relevant: such as
a
: to make the final connection of
tied in the new branch pipeline
b
: to coordinate in such a manner as to produce balance and unity
the illustrations were tied in with the text
c
: to use as a tie-in especially in advertising
: to become tied in
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Merriam-Webster unabridged
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Time Traveler for tie-in
The first known use of tie-in was in 1793
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