Toon VS Character VS Sprite [duplicate]

I am hoping this is not a dumb question, but I have looked around and not knowing this is really bugging me.

I have heard many people talk about a "Toon" or a "Character", and a few times of a "Sprite", to refer to their fictional characters they play in the game.

I want to know if one of these are more correct than the other?

I have heard more people and websites refer to them as Characters, rather than a 'toon', but what is the difference, if any?