Meaning of upstream In English

• 0 (moving) on a river or stream towards its origin:

  • Salmon swim upstream against very strong currents to reach their breeding areas.

  • The company's upstream business includes oil exploration and production.

• 1 against the current toward the starting point of a river:

  • Rowing upstream was hard going.

• 2 relating to something that happens earlier in a process or series of events:

  • The company's upstream business includes oil exploration and production.