transitive verb. To control or direct according to rule, principle, or law.

transitive verb. To adjust to a particular specification or requirement.

transitive verb. To adjust (a mechanism) for accurate and proper functioning.

transitive verb. To put or maintain in order.

To adjust by rule, method, or established mode; govern by or subject to certain rules or restrictions; direct.

To put or keep in good order: as, to regulate the disordered state of a nation or its finances; to regulate the digestion.

Specifically, in musical instruments with a keyboard, so to adjust the action that it shall be noiseless, prompt, and sensitive to the touch.

transitive verb. To adjust by rule, method, or established mode; to direct by rule or restriction; to subject to governing principles or laws.

transitive verb. To put in good order.

transitive verb. To adjust, or maintain, with respect to a desired rate, degree, or condition

transitive verb. to adjust its rate of running so that it will keep approximately standard time.

transitive verb. undefined

verb. To dictate policy.

verb. To control or direct according to rule, principle, or law.

verb. To adjust to a particular specification or requirement: regulate temperature.

verb. To adjust (a mechanism) for accurate and proper functioning.

verb. To put or maintain in order: regulate one's eating habits.

verb. shape or influence; give direction to

verb. fix or adjust the time, amount, degree, or rate of

verb. bring into conformity with rules or principles or usage; impose regulations

verb. check the emission of (sound)

"One of the more credible arguments is that while Congress may regulate commerce between the states (the term regulate meaning something entirely different to the Founders, chiefly that individual state commercial law should have some uniformity), how can Congress regulate non-activity or no commerce?"