Main Entry:

rul·er

Pronunciation:

\ˈrü-lər\

Function:

noun

Date:

14th century

1: one that rules ; specifically : sovereign2: a worker or a machine that rules paper3: a smooth-edged strip (as of wood or metal) that is usually marked off in units (as inches) and is used as a straightedge or for measuring

— rul·er·ship \-ˌship\ noun