1. Incorrectly depicting three-dimensional space on a flat surface, as in artwork. That box in the background of your painting looks like it's out of perspective to me.

2. Lacking an awareness of something's true value, importance, or significance. If the kids have things out of perspective, they need to see the devastation caused by the hurricane. If you don't think it's that big a deal, you've definitely got things out of perspective. I mean, each of us will get 10 years in prison if we're caught!