regulate

American  

[reg-yuh-leyt] / ˈrɛg yəˌleɪt /

verb (used with object)

regulated, regulating

1. to control or direct by a rule, principle, method, etc..

   The statute is intended to regulate the business practices of architects by establishing a code of professional conduct.

   Synonyms:

   dispose, arrange, adjust, order, conduct, manage, govern, rule

2. to adjust to some standard or requirement, as amount, degree, etc..

   A film was applied to the windows to help regulate the temperature and reduce glare.

   Synonyms:

   set

3. to adjust so as to ensure accuracy of operation.

   If the watch is consistently off, it can be fixed relatively simply by regulating the beat rate.

4. to put or keep something in good order or within reasonable limits.

   Playful interactions with adult caregivers help children develop the ability to regulate their emotions and behavior.

   Synonyms:

   balance

5. Biology. to adjust or adapt (a bodily process or function) in response to external stimuli.

6. Genetics. to control the expression of (a gene or genes).

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regulate British  

/ ˈrɛɡjʊˌleɪt /

verb

1. to adjust (the amount of heat, sound, etc, of something) as required; control

2. to adjust (an instrument or appliance) so that it operates correctly

3. to bring into conformity with a rule, principle, or usage

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Other Word Forms

• misregulate verb (used with object)
• nonregulated adjective
• nonregulative adjective
• overregulate verb
• preregulate verb (used with object)
• quasi-regulated adjective
• regulative adjective
• regulatively adverb
• regulatory adjective
• reregulate verb (used with object)
• unregulated adjective
• unregulative adjective
• well-regulated adjective

Etymology

Origin of regulate

First recorded in 1620–30, from Late Latin rēgulātus (past participle of rēgulāre “to direct”); see regula, -ate ¹

Explanation

The on-off spigot regulates the flow of water into your bathtub. When a government regulates an industry, they set standards the industry must follow. To regulate means to impose control. Regulate shares a root with the word, regular. When the transit authority regulates a train schedule, it makes sure trains arrive on a more regular schedule. The pharmaceutical industry is heavily regulated –– before a drug can be marketed, it must be tested. On a more personal level, if you want to regulate your digestive system, try eating more fiber... or prunes!

Example Sentences

The fly in this tasty beverage, however, is the Commerce Clause, the constitutional provision that says the government may regulate commerce “among the several States.”

From The Wall Street Journal • Apr. 20, 2026

Literally no country has less trust in its leaders to regulate A.I. effectively than we do.

From Slate • Apr. 14, 2026

The locus coeruleus, found in the brainstem, helps regulate this process through long nerve fibers that extend to the olfactory bulb.

From Science Daily • Apr. 11, 2026

He stressed that time to act is limited and called for new laws to regulate AI.

From Barron's • Apr. 10, 2026

They regulate lots of its functions—filtering blood, producing hormones, helping to control blood pressure, and removing waste from the body.

From "Ugly" by Robert Hoge

Related Words

• adjust
• administer
• balance
• classify
• conduct
• control
• coordinate
• determine
• govern
• handle
• improve
• monitor
• oversee
• readjust
• rectify
• standardize
• supervise