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n. pl. a·pex·es or a·pi·ces (āpĭ-sēz′, ăpĭ-) 1. a. The highest point of a structure, object, or geometric figure: the apex of a hill; the apex of a triangle. b. The usually pointed end of an object; the tip: the apex of a leaf. 2. a. The highest level or degree that is attained, as in a hierarchy. See Synonyms at summit. b. The period of greatest achievement: won several Olympic medals at the apex of her career. [Latin.] |
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