ruler

views updated May 23 2018

rul·er / ˈroōlər/ • n. 1. a person exercising government or dominion. ∎  Astrol. another term for ruling planet.2. a straight strip or cylinder of plastic, wood, metal, or other rigid material, typically marked at regular intervals, to draw straight lines or measure distances.DERIVATIVES: rul·er·ship / ship/ n.