/ut"mohst'/ or, esp. Brit., /-meuhst/ , adj.
1. of the greatest or highest degree, quantity, or the like; greatest: of the utmost importance.
2. being at the farthest point or extremity; farthest: the utmost reef of the island.
n.
3. Also, uttermost . the greatest degree or amount: the utmost that can be said; The hotel provides the utmost in comfort.
4. the most or best of one's abilities, powers, etc.: He did his utmost to finish on time.
5. the extreme limit or extent: His patience was taxed to the utmost.
[ bef. 900; ME utmest, OE utemest. See OUT, -MOST ]
Syn. 1. maximum, highest, foremost, chief, major.