Not religious doesn't necessarily mean atheist

[Astreja]

Everyone has a religion. You would have to redefine religion from their primary meaning in the past to escape this fact.

MK, if someone doesn't believe in gods and doesn't believe in supernatural things and doesn't worship anything, why call their worldview a religion?  If you broaden the meaning of a term too much you strip it of meaning.

As for the "primary meaning" of a word, language is in a constant state of flux.  Words do change, and it's pointless to insist on preserving an old definition that no one uses anymore.

One example:  The word "nice" is thought of as a positive word, but it wasn't always that way.  It originally derives from the Latin word "nescius," meaning "ignorant."  It's also had other negative connotations over the years.  400 years or so ago, if you had called a woman nice she might have taken it as an accusation that she had loose morals, and your compliment would have elicited a slap in the face.

As far as I'm concerned, if there are no supernatural beings or ideas involved, and no worship rituals, calling something a religion is just plain silly.