Yea, what really is this thing called Trine? Well dictionary.net defines it as something to do with stars aligning and also as a synonym for the Trinity.
I personally am more of a fan of the urbandictionary definition, even though it has even less to do with what our game actually is.
Also TotalBiscuit of Youtube fame has also his own definition in the above video, which is a very nice video to say the least.
Enjoy, and there is “more” to come soon.