1 the highest point, esp. of a mountain; the apex.
2 the highest degree of power, ambition, etc.
3 (in full summit meeting, talks , etc.) a discussion, esp. on disarmament etc., between heads of government.
Derivatives:
summitless adj.
Etymology: ME f. OF somet, som(m)ete f. som top f. L summum neut. of summus
Useful english dictionary. 2012.