From The Collaborative International Dictionary of English v.0.48 [gcide]:
Summit \Sum"mit\, n. [F. sommet, dim. of OF. som, sum, top, from
L. summum, from summus highest. See Sum, n.]
1. The top; the highest point.
[1913 Webster]
Fixed on the summit of the highest mount. --Shak.
[1913 Webster]
2. The highest degree; the utmost elevation; the acme; as,
the summit of human fame.
[1913 Webster]
3. (Zool.) The most elevated part of a bivalve shell, or the
part in which the hinge is situated.
[1913 Webster]
Summit level, the highest level of a canal, a railroad, or
the like, in surmounting an ascent.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
summit
n 1: the highest level or degree attainable; the highest stage
of development; "his landscapes were deemed the acme of
beauty"; "the artist's gifts are at their acme"; "at the
height of her career"; "the peak of perfection"; "summer
was at its peak"; "...catapulted Einstein to the pinnacle
of fame"; "the summit of his ambition"; "so many highest
superlatives achieved by man"; "at the top of his
profession" [syn: acme, height, elevation, peak,
pinnacle, summit, superlative, meridian, tiptop,
top]
2: the top or extreme point of something (usually a mountain or
hill); "the view from the peak was magnificent"; "they
clambered to the tip of Monadnock"; "the region is a few
molecules wide at the summit" [syn: peak, crown, crest,
top, tip, summit]
3: a meeting of heads of governments [syn: summit, {summit
meeting}]
v 1: reach the summit (of a mountain); "They breasted the
mountain"; "Many mountaineers go up Mt. Everest but not all
summit" [syn: summit, breast]