Height and Spread = height is obvious; the spread how much horizontal room a plant is going to take up in a couple of months. Take heed-it can be hard to believe your cute little seeding is going to turn into the monster they suggest, but it's true.
Full sun = A full day of sun or close to it.
Part shade, also called part sun = Either half a day of sun 9morning sunlight followed by afternoon shade is an example,) or a full day of dappled sun.
Source: Ontario Gardener