1. control or maintain the rate or speed of (a machine or process) so that it operates properly: "a hormone that regulates metabolism and organ function"Similarcontroladjustmanagebalancesetsynchronizemodulatetune
▪ set (a clock or other apparatus) according to an external standard:"the standard time by which other clocks were regulated"
Word Originlate Middle English (in the sense ‘control by rules’): from late Latin regulat- ‘directed, regulated’, from the verb regulare, from Latin regula ‘rule’.