Definition of REGULATION

a statement spelling out the proper procedure or conduct for an activity <it's against community regulations to leave your trash on the curb for more than two days>
the act or activity of looking after and making decisions about something <the owner seldom visited the plant and did not take an active part in the regulation of the company>
the duty or function of watching or guarding for the sake of proper direction or control <the regulation of the soccer team was left entirely to the head coach and her assistants>

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