ˈæk.mi ˌɛlɪˈveɪʃən haɪt məˈɹɪdɪən məˈɹɪdiən ˈpɪnəkəl ˈsʌmɪt suːˈpɜː.lə.tɪv suˈpɝː.lə.tɪv tɒp tɑp tɒps tɑps of the highest quality an ace reporter a crack shot a first-rate golfer a super party played top-notch tennis an athlete in tiptop condition she is absolutely tops the extreme top or 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