Any set of computer networks that communicate using the Internet Protocol. (An intranet.)
The Internet, the largest global internet.
An internet connection, internet connectivity, access to the internet.
Do you have internet at your place? My internet is down and I want to check my email.
A fictitious unit of scoring, awarded for making outstanding posts.
To use the Internet; to search for something using the Internet; to surf the Internet.
Having no idea what that means, I am internetting like mad.