What's Mean by Scouring?

1 : to rub hard with a rough substance or object in order to clean. 2 : to free or clear from impurities by or as if by rubbing. scour. verb. scoured; scouring.

What does scouring action mean?

In a drain pipe, the lifting or scrubbing of loose particles (including sand, grit, and small pebbles) from the interior surface of the pipe and carrying them downstream. To achieve this action, sufficient flow velocity is required.

What is scouring the Internet?

To search thoroughly inside of or all around some place or thing for someone or something. I've been scouring the internet for information about this strange new app my kids are using.