paramount

Definitions:

The highest in rank.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)
Above all; possessing the highest title or jurisdiction; superior to all others; eminent.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Superior to all others.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
The chief.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
Chief; supreme.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
Above all others; chief.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Superior to all others: chief: of the highest importance.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)

Usage examples:

In his own house, of course, especially among those over whom he was wont to rule in athletic sports, his authority was paramount
- The Willoughby Captains by Talbot Baines Reed
And the next time he was three seats away from me in the Paramount
- Dave Dawson at Casablanca by Robert Sydney Bowen
Novelty, that is the desire for achieving new expeditions, was still considered of paramount importance, but unfortunately there was very little new material left.
- Above the Snow Line by Clinton Thomas Dent