early 15c., "adjust by rule, control," from Late Latin regulatus, past participle of regulare "to control by rule, direct," from Latin regula "rule" (see regular). Meaning "to govern by restriction" is from 1620s. Related: Regulated; regulating.
regulate reg·u·late (rěg'yə-lāt')
v. reg·u·lat·ed, reg·u·lat·ing, reg·u·lates
To control or direct according to rule, principle, or law.
To adjust to a particular specification or requirement.
To adjust a mechanism for accurate and proper functioning.
To put or maintain in order.