Ok; thanks, tsu. (FWIW, I did go to your link.) Here, it would be called a parking garage, even aboveground. I was confused, because to me a ramp is a means of conveyance, as in movement, not something you cease moving on for an extended period of time.
We have some parking ramps garages where each level is slanted, and some where the parking areas are level with ramps connecting them.

Thanks to zm. (hey, can I call you zoom?) and Branny for the info. on the Fr. and Dutch words.

Edit: speaking of different uses for the same word--I just proofread and noticed my uses of 'level'.