Generosity, possibly.
No, the opposite of a definition is certainly not always true. That would depend on the definitions and the meaning of the opposite.
Adjacent
the opposite of the original concept your learning.
When a figures opposite sides are not the same.
The opposite of x is -x.For example,the opposite of three is -3.The opposite of a negative number is positive.Fore example,the opposite of -7 is 7.
Greed!
generositycharity
Greed.
The opposite of greed is generosity. Generosity involves a willingness to share resources, time, or talents with others without expecting anything in return. It is characterized by a selfless desire to help and support others.
No, the opposite of a definition is certainly not always true. That would depend on the definitions and the meaning of the opposite.
Undefinition
specific
what is the opposite of brooding
Detached
opposite
The opposite of download
The opposite of the action "to share" would be to withhold or keep (to oneself). (One sense of sharing is selflessness or generosity, where the opposite would be selfishness, cupidity, or avarice.)