[@HaltingBlooper]
[img]http://media.web.britannica.com/eb-media/59/89959-004-732AD68F.gif[/img]

This is a geological fact that everyone accepts and is taught at scools everywhere.

[quote]continent
[kon-tn-uh nt] 
noun
1.
one of the main landmasses of the globe, usually reckoned as seven in number (Europe, Asia, Africa, North America, South America, Australia, and Antarctica).[/qoute]

And this is the dictionary definition from dictionary.com.