[mtrichardson]

That's not multi-factor authentication.

True multi-factor authentication involves a combination of something you know (eg, your password), something you have (your phone, a fob, etc.) and something you are (generally biometric things, which for obvious reasons haven't picked up too much).

Multiple security questions are just additional things-you-know, and as such, aren't multifactor.

[thaumaturgy]

Ah, thanks, you're right.

My bank's website specifically calls it "multi-factor authentication", and I never bothered to double-check the term.