simple past tense and past participle of upstream

In a direction against the flow of a current or stream of fluid (typically water); upriver. / (oil industry) Involving exploration and pre-production rather than refining and selling.

Against the current.

(intransitive) To stream upward.

Part of the river towards the upstream direction. / (open-source software) The original developers or maintainers of software.

(business) A partnership between an independent record label and a major record label, by which successful acts signed to the independent label are transferred to the major label.

present participle of upstream

Third-person singular simple present indicative form of upstream

plural of upstream

plural of upstreamer