noun, plural a·pex·es, a·pi·ces [ey-puh-seez, ap–uh-] /ˈeɪ pəˌsiz, ˈæp ə-/.
- the tip, point, or vertex; summit.
- climax; peak; acme: His election to the presidency was the apex of his career.
- Astronomy. solar apex.
- a type of international air fare offering reduced rates for extended stays that are booked in advance.
noun plural apexes or apices (ˈæpɪˌsiːz, ˈeɪ-)
- the highest point; vertex
- the pointed end or tip of something
- a pinnacle or high point, as of a career, etc
- Also called: solar apex astronomy the point on the celestial sphere, lying in the constellation Hercules, towards which the sun appears to move at a velocity of 20 kilometres per second relative to the nearest stars
n acronym for
- Advance Purchase Excursion: a reduced airline or long-distance rail fare that must be paid a specified number of days in advance
- (in Britain) Association of Professional, Executive, Clerical, and Computer Staff
c.1600, from Latin apex “summit, peak, tip, top, extreme end;” probably related to apere “to fasten, fix,” hence “the tip of anything” (one of the meanings in Latin was “small rod at the top of the flamen’s cap”), from PIE *ap- “to take, reach.” Proper plural is apices.
n. pl. a•pex•es
- The pointed end of a conical or pyramidal structure.
- The highest point, especially the vertex of a triangle, cone, or pyramid.