Learner's definition of DISCRETION
1 : the right to choose what should be done in a particular situation
Each artist in the gallery has discretion over the price that will be charged for his or her work.
The coach used/exercised his own discretion to let the injured quarterback play.
The amount each person contributes will be left to the discretion of the individual. [=each person will decide how much he or she will contribute]
Because of the violence in the movie, parental discretion is advised. [=parents are advised to think about whether or not they want their children to see the movie]
◊ Something that is done at your discretion is done if, how, when, etc., you choose to do it.
2 : the quality of being careful about what you do and say so that people will not be embarrassed or offended: the quality of being discreet
He always uses care and discretion when dealing with others.
She handled the awkward situation with great discretion.
She is the soul of discretion. [=she is very discreet]
discretion is the better part of valor
— used to say that it is better to be careful than to do something that is dangerous and unnecessary