[ tahy-in ]
/ ˈtaɪˌɪn /
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pertaining to or designating a sale in which the buyer in order to get the item desired must also purchase one or more other, usually undesired, items.
of or relating to two or more products advertised, marketed, or sold together.
an arrangement or campaign whereby related products are promoted, marketed, or sold together: a book and movie tie-in.
a tie-in sale or advertisement.
an item in a tie-in sale or advertisement.
any direct or indirect link, relationship, or connection: There is a tie-in between smoking and cancer.
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Origin of tie-in

First recorded in 1920–25; adj., noun use of verb phrase tie in
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use tie-in in a sentence

British Dictionary definitions for tie-in

tie in

verb (adverb)
to come or bring into a certain relationship; coordinate
noun tie-in
a link, relationship, or coordination
publicity material, a book, tape, etc, linked to a film or broadcast programme or series
  1. a sale or advertisement offering products of which a purchaser must buy one or more in addition to his purchase
  2. an item sold or advertised in this way, esp the extra item
  3. (as modifier)a tie-in sale
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Idioms and Phrases with tie-in

tie in

Connect closely with, coordinate, as in They are trying to tie in the movie promotion with the book it is based on, or His story does not tie in with the facts. [First half of 1900s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.