- adverb towards the source of a river
- adjective referring to the operations of a company at the beginning of a process (as drilling for oil as an operation of a petroleum company).
- In communications, the direction of the flow of information from a customer to a content provider. For example, a person navigating the Internet sends information upstream when requesting a Web page. Generally utilized in the context of data transfer, but may also refer to other signals from customers, such as requests for pay-per-view programming. This contrasts with downstream, where the flow of information is in the other direction.
- adverb in the opposite direction to that in which a river or stream is flowing