What is hotlinking?

Question

Whats hotlinking liek when sites say no hotlinking.
Please list all ways :)

Answer 1

Hot linking is a special way that two programs can share data; changing data in one program automatically changes the same data in another program. An example of a hot link is a word processor document with spreadsheet data. If you change the spreadsheet data using a spreadsheet program, the data automatically changes in the work processor document as well.

Answer 2

http://altlab.com/hotlinking.html