Definition of: summit

(sum′it) noun
1. The highest part; the top; vertex.
2. The highest degree; maximum.
3. The highest level or office, as of a government or business organization.
4. A meeting of executives of the highest level, as heads of government.
—adjective Of or involving those at the highest level: a summit conference. [<OF sommette, dim. of som a summit, top <L summum, neut. of summus highest] Synonyms: acme, apex, cap, climax, crown, height, peak, pinnacle, top, vertex. Antonyms: abyss, base, bottom, chasm, deep, depth, gorge, gulf, pit, vale, valley.