merˈchandize or merˈchandise transitive verb

1. To traffic in (Shakespeare)
2. To buy and sell
3. To plan the advertising or supplying of, or the selling campaign for (a product)

To be engaged in the selling of a product

merˈchandizer or merˈchandiser noun

A person who is responsible for supplying a product

merˈchandizing or merˈchandising noun

1. The selling of a product
2. The creation and selling of products, eg dolls and costumes, associated with a particular (esp children's) cinema film or television programme
3. Such products