1. 
[syn: topmost, uppermost, upmost]
ADVERB (2)
1.  in or into the most prominent position, as in the mind; 
- Example: "say what comes uppermost"
2.  in or into the highest position; 
- Example: "the blade turned uppermost"
The Collaborative International Dictionary of English v.0.48:
Uppermost \Up"per*most`\, a. [From Up, Upper; formed like
   aftermost. Cf. Upmost.]
   Highest in place, position, rank, power, or the like; upmost;
   supreme.
   [1913 Webster]
         Whatever faction happens to be uppermost. --Swift.
   [1913 Webster]
WordNet (r) 3.0 (2006):
uppermost
    adv 1: in or into the most prominent position, as in the mind;
           "say what comes uppermost"
    2: in or into the highest position; "the blade turned uppermost"
    adj 1: at or nearest to the top; "the uppermost book in the
           pile"; "on the topmost step" [syn: topmost,
           uppermost, upmost]
Moby Thesaurus II by Grady Ward, 1.0:
56 Moby Thesaurus words for "uppermost":
   above, acmatic, all-absorbing, apical, best, capital, cardinal,
   chief, consummate, controlling, dominant, first, first-class,
   first-rate, foremost, greater, greatest, head, headmost, higher,
   highest, leading, loftiest, main, master, maximal, maximum,
   meridian, meridional, most, over, overmost, overriding, overruling,
   paramount, predominant, preeminent, premier, primary, prime,
   principal, ranking, summital, superior, superlative, supreme,
   tip-top, top, top-notch, topmost, ultimate, upmost, upper, utmost,
   vertical, zenithal