upstream in a sentence

adv.

Definition

Upstream refers to the direction or source from which a river flows or to the initial factors contributing to a problem or situation.

The river flows upstream towards the mountains, making it a challenging trek for hikers.
In the debate about climate change, scientists are advocating for policies that address upstream causes of pollution.
The engineers proposed a new design that would improve water quality by filtering contaminants upstream.
During the concert, the band decided to play a song that was originally written upstream of their popular hits.
The fish migrate upstream each year to spawn in the same waters where they were born.