If "mean" refers to being unkind:
* Kind
* Compassionate
* Generous
* Thoughtful
* Empathetic
If "mean" refers to being stingy:
* Generous
* Open-handed
* Big-hearted
* Charitable
If "mean" refers to being low in value or quality:
* High-quality
* Excellent
* Superior
* Exceptional
If "mean" refers to the mathematical average:
* Median
* Mode
* Range
If "mean" refers to a specific value or average:
* High
* Low (depending on the context)
It's important to consider the context of the word "mean" to determine the most appropriate opposite.