What is inbound link,What is outbound link?

What is inbound link?

Link of your own website on other website or webpage .

What is outbound link? 

Link to other website from your website. 
What is website? 
A website or web site is a collection of related network web resources, such as web pages, 
multimedia content, which are typically identified with a common domain name, and 
published on at least one web server