Are anime that air before a manga adaptation considered filler anime?


In the question [Has an anime ever come out before the manga was
published?](https://anime.stackexchange.com/questions/2351/has-an-anime-ever-
come-out-before-the-manga-was-published) it became quite obvious that there
are indeed several animes that air before their manga has been made.

But this also made me wonder about the following:  
**Does this imply that all anime that air before a manga of it exist should be
considered fillers?**

Fillers are non-canonical material, which usually implies it did not happen in
the manga. Or as Urban Dictionary stated it

> _**filler**_
>
> A segment of anime, whether it be an entire episode or part of one, which
> does not appear in the manga of the title. Fillers, as the name implies,
> "fills" an episode with non-canonical material which has been written
> usually by the same company which animates it.




I feel there's a bit of misconception here.

  * **Fillers** == **Not canon**
  * **Canon** == Original material from the original author.

There are episodes in Naruto for example, (like Naruto episode 101) which are
**canon but were not in the manga**.

So the question of whether content being filler or not has nothing to do with
it being in one medium or another (although there's usually a correlation).
It's about **who made it**.




I feel there's a bit of misconception here.

  * **Fillers** == **Not canon**
  * **Canon** == Original material from the original author.

There are episodes in Naruto for example, (like Naruto episode 101) which are
**canon but were not in the manga**.

So the question of whether content being filler or not has nothing to do with
it being in one medium or another (although there's usually a correlation).
It's about **who made it**.

