Is Minecraft a massively multi player online (MMO) game?

Hello,

I'm totally and completely new to Minecraft and have never played it before. I was wondering if anyone might happen to know if Minecraft can be played with other players over the internet like an MMO or even an MMORPG? And if so, how is this done?

Thank you

It's more co-op through servers. It's nothing like an MMO

What's the difference between regular Minecraft and Minecraft Realms?