1. adjective /ɡʊd/
a) Acting in the interest of good; ethical.
good intentions
b) Useful for a particular purpose; functional.
When we are happy, we are always good, but when we are good, we are not always happy.
2. adverb /ɡʊd/
Well; satisfactorily or thoroughly.
If Silvertip refuses to give you the horse, grab him before he can draw a weapon, and beat him good. Youre big enough to do it.
3. noun /ɡʊd/
a) The forces or behaviors that are the enemy of evil. Usually consists of helping others and general benevolence.
b) A result that is positive in the view of the speaker.
Wikipedia foundation.