There are multiple definitions - click on the translation that matches your context.

联合促销

形容词

full

tie-in

adjective

Definitions of tie-in

English

a game, food item or toy etc that is connected with a film or television programme etc

There is nothing new about the opening of a big blockbuster movie being accompanied by various marketing tie-ins.

English

when two or more companies try to work together to sell their products

Funky Rugs, the UK's leading online rug store, is pleased to announce a tie-in with The Natural Rug Store.

English

where two or more products must be bought together; a product that is sold this way

In tie-in sales of other subscriptions and devices used on the mobile phone network the consumer is protected by the tie-in sales provision in the Communications Market Act.