noun A high point: the highest point of any range, the most developed stage of any process, or the culmination of any field or historical period. .mw-parser-output .defdate{font-size:smaller}
noun A paragon: a person or thing representing such a high point.
noun Full bloom or reproductive maturity.
noun Sexual orgasm.
noun Synonym of crisis, the decisive moment in the course of an illness.
noun Alternative letter-case form of Acme, particularly as a threading format.