Definitions

1. noun

A vessel or boat traveling upstream, especially in the Great Lakes or a similar body of water.

“The upbound freighter passed us as it made its way to the locks.”

2. adjective

Traveling or directed upstream.

“The upbound route on the river can be challenging due to strong currents.”

3. verb

To travel or go upstream.

“The fishermen upbound the river to reach their favorite fishing spot.”