marijuana is a drug only in the sense that it makes music great, it makes sex even better, and it makes food even more delicious than it already is. it's not addictive and nobody can overdose on it.
Marijuana is a drug in that it has a physiological effect on the body when taken into the body.
I agree that it belongs in a different class from other more dangerous illegal substances, but it is undoubtedly a drug by any accepted definition of the term.
