1Designating, of, or relating to the smallest of the hills of Rome or the temple which formerly stood at its summit.
2US Of or relating to the Capitol in Washington or the capitol building in a particular State.
The Capitoline Hill in Rome.
Late Middle English; earliest use found in John Lydgate (c1370–c1449), poet and prior of Hatfield Regis. From classical Latin Capitōlīnus of or connected with the Capitol, epithet of Jupiter from Capitōlium + -īnus.