Pronunciation: (up'ur-mōst" or, esp. Brit., -must), [key]
1. highest in place, order, rank, power, etc.: the uppermost peaks of the mountain; the uppermost class of society.
2. topmost; predominant: a subject of uppermost concern.
in or into the uppermost place, rank, or predominance: The blossoms grow uppermost on the stems of these flowers; the thoughts that came uppermost to her mind.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.