Partial means the absolute best thing ever in Wales. If you have had the best night of your life you would say it is partial! Saying that a welsh person's performance review was partial would make them very happy!
Definitions include: A Female who dates more than one guy, not necessarily for sex, but to have a good time when her "regular" man isn't available. (good connotation) 2. A female who is a slut, but thinks she has all of the men (bad connotation).