- 1watershed (in something) an event or a period of time that marks an important change The middle decades of the 19th century marked a watershed in Russia's history.
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
- 2a line of high land where streams on one side flow into one river, and streams on the other side flow into a different river
Check pronunciation: watershed