Pronunciation: (prē'mō; for 1, 2 also It. prē'mô), [key]
—n., pl. -mos, -miPronunciation: (-mē), [key]
1. the part of a piano duet played on the upper half of the keyboard.
2. the first or leading part in an ensemble.
a. first-class: dinner at a primo restaurant.
b. highly valuable or most essential: the primo player on the team.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.