Intermediate goods, producer goods or semi-finished products are goods, such as partly finished goods, used as inputs in the production of other goods including final goods. A firm may make and then use intermediate goods, or make and then sell, or buy then use them. In the production process, intermediate goods either become part of the final product, or are changed beyond recognition in the process.
This means intermediate goods are resold among industries.
An automobile engine is an example of an intermediate good, and is used in the production of the final good, the assembled automobile.