| 1. | 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. |
| 2. | of or pertaining to two or more products advertised, marketed, or sold together. |
| 3. | an arrangement or campaign whereby related products are promoted, marketed, or sold together: a book and movie tie-in. |
| 4. | a tie-in sale or advertisement. |
| 5. | an item in a tie-in sale or advertisement. |
| 6. | any direct or indirect link, relationship, or connection: There is a tie-in between smoking and cancer. |

| tie-in (tī'ĭn') n. One thing that is related to or connected with another. |
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