Definition of "Exercise" :

noun: an action, often used negatively and without consequences

"An exercise in futility."

noun: the activity of exerting your muscles in various ways to keep fit

"The doctor recommended regular exercise."

noun: a task performed or problem solved in order to develop skill or understanding

noun: systematic training by multiple repetitions

noun: the act of using

noun: (usually plural) a ceremony that involves processions and speeches

"Academic exercises."

verb: do physical exercise

verb: give a workout to

"Some parents exercise their infants."

verb: learn by repetition

verb: put to use

verb: carry out or practice; as of jobs and professions