watershed

verb1 of 3

a period of time during which important, significant changes take place

• “This is a watershed moment for the whole industry.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

noun2 of 3

The topographical boundary dividing two adjacent catchment basins, such as a ridge or a crest.

adjective3 of 3

Serving to mark a significant development, change in direction, etc.