ˈæk.mi bɹɛst kɹɛst kɹaʊn ˌɛlɪˈveɪʃən haɪt məˈɹɪdɪən məˈɹɪdiən ˈpɪnəkəl ˈsʌmɪt ˈsʌmɪt suːˈpɜː.lə.tɪv suˈpɝː.lə.tɪv tɒp tɑp reach the summit (of a mountain) They breasted the mountain Many mountaineers go up Mt. Everest but not all summit a meeting of heads of governments 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 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