1. a current or flow moving in the opposite direction to another current
Usage: often used in scientific or technical contexts

1. moving or flowing in a direction opposite to the main current

1. in a direction opposite to the main current or flow

Examples

• The fish swam counterstream to reach their spawning grounds.
• A counterstream eddy formed behind the large rock in the river.
• The boat moved counterstream, fighting against the strong current.
• Counterstream migration is common in many fish species.
• The wind blew counterstream to the prevailing weather pattern.