uppermost

UK: /ˈʌpə^rməʊst/

US: /ˈʌpɚˌmoʊst/

US: (up′ər mōst′ or, esp. Brit., -məst)

WordReference Random House Learner's Dictionary of American English © 2026

up•per•most /ˈʌpɚˌmoʊst/   adj. Also, up•most /ˈʌpˌmoʊst/ .

1. highest in place, order, rank, power, etc.;
   topmost;
   predominant:
   a subject of uppermost concern.

adv. 

2. in or into the uppermost place, rank, or importance.

WordReference Random House Unabridged Dictionary of American English © 2026

up•per•most  (up′ər mōst′ or, esp. Brit., -məst), adj. Also, upmost. 

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.

adv. 

3. 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.

• upper¹ + -most 1475–85

Collins Concise English Dictionary © HarperCollins Publishers::

uppermost / ˈʌpəˌməʊst/ adjective
also: upmost

1. highest in position, power, importance, etc

adverb

1. in or into the highest position, etc