1. To ask or plead for something, especially a superstitious charm or omen, to make one's wish a reality. I always used to wish upon the first star of the night when I was a kid. People from all over the country come to the idol, wishing upon it to better their lives in some way or another.

2. To desire that some person, situation, or circumstance, especially a negative one, happen to or be imposed or foisted upon someone else. Typically used in negative constructions. In this usage, a noun or pronoun is used between "wish" and "on." I wouldn't wish the death of a child upon my worst enemy. No, I wouldn't wish such a difficult task upon you. I just don't see the point in wishing bad things upon anyone else.