Definitions

1. noun

A flow of water or other fluid back into the place from which it came, especially after it has passed over a barrier or obstacle.

“The storm’s heavy rainfall created a strong backwash that flooded the nearby park.”

2. noun

The unpleasant feeling of being sick or queasy, especially after eating or drinking something.

“The smell of the spoiled food gave him a bad backwash and he had to run outside to throw up.”

3. verb

To flow or be thrown back into the place from which it came, especially after passing over a barrier or obstacle.

“The waves backwashed over the shore, eroding the sand and rock formations.”