Yes, the word upstream is an adverb.It is also an adjective.Some example sentences are:The salmon are swimming upstream.You'll find the campsite upstream from here.
Upstream and downstream refers to the supply chain of an industry. For example, if you're looking at a distribution plant then the manufacture would be downstream and the retailer would be upstream. Events or processes that happen before whatever is being looked at is downstream and whatever happens after is upstream.
upstream
Upstream - newspaper - was created in 1996.
downstream and upstream
The duration of Upstream - film - is 3600.0 seconds.
The duration of Swimming Upstream is 3240.0 seconds.
Swimming Upstream was created on 2003-02-27.
when a body moves against the flow, it is known as upstream flow
Upstream - film - was created on 1927-01-30.
Upstream Print Solutions was created in 1995.
Upstream Print Solutions's population is 300.