Is atheism a belief?

[T0 Th3 M4X]

Do you believe everything people point out?  That's why you do research.  It someone tells you something, check it out for yourself.

A "dictionary" is an authority for defining terms. 

If you won't listen to the Merriam-Webster dictionary, then you surely aren't going to accept my definition for something.

Lets see how M-W dictionary defines dictionary then.  

1 : a reference source in print or electronic form containing words usually alphabetically arranged along with information about their forms, pronunciations, functions, etymologies, meanings, and syntactic and idiomatic uses

2 : a reference book listing alphabetically terms or names important to a particular subject or activity along with discussion of their meanings and applications

3 : a reference book listing alphabetically the words of one language and showing their meanings or translations in another language

4 : a computerized list (as of items of data or words) used for reference (as for information retrieval or word processing)

Where does M-W say that dictionaries define anything?

The fact that dictionaries only refer to current usage of words is pretty evident once you consider that dictionaries start including new words/terms or change the *definition* after they acknowledged the new word/term or changed usage already is applied in everyday used by society.
Nobody reads a dictionary to [b]tell[/bs] him on how to use a word (but Max maybe) but to inform himself about the current consensus of usage. Otoh the *i have an authoritative book* fallacy is pretty common amongst adherents of (abrahamic) religions.

From M-W homepage:

No other dictionary matches M-W's accuracy and scholarship in defining word meanings. Our pronunciation help, synonyms, usage and grammar tips set the standard. Go beyond dictionary lookups with Word of the Day, facts and observations on language, lookup trends, and wordplay from the editors at Merriam-Webster Dictionary.