adjective Also upmost.
- highest in place, order, rank, power, etc.: the uppermost peaks of the mountain; the uppermost class of society.
- 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.
adjective Also: upmost
- highest in position, power, importance, etc
- in or into the highest position, etc
late 15c., from upper + -most.