This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

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

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

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

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

v. To dictate policy.

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

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

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

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

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

v. To put in good order.

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

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.

v. shape or influence; give direction to

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

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

v. check the emission of (sound)

"But, half the blame can be laid to the ambiguity of the term regulate, and also to the clause general welfare"

to regulate a clock   

regulated    regulates    regulating   

correct    set    adjust    limit    throttle    trammel    restrain    bound    restrict    confine   

control    adjust    manage   

rule    regulation    regulator    ruler   

upregulate    downregulate    deregulate   

direct    arrange    govern    order    dispose    rule    adjust    methodize    shape    settle   

overregulate    reregulate   

choirmaster    too-rapid    quick-diagnostic    waterborne    pressure-release    drinking-water    pluripotent    zero-gee    particle-acceleration    cut-in