n. 25B6; noun
the summit of Mont Blanc : (MOUNTAIN) TOP, peak, crest, crown, apex, tip, cap, hilltop.
the summits of world literature : ACME, peak, height, pinnacle, zenith, climax, high point/spot, highlight, crowning glory, best, finest, nonpareil.
the next superpower summit : MEETING, negotiation, conference, talk(s), discussion.
base, nadir.