• synonyms


[ ey-peks ]
/ ˈeɪ pɛks /

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.




culmination, pinnacle, apogee, cusp, acme, zenith, point, climax, tip, crown, maximum, roof, height, vertex, summit, peak, spire, crest, meridian, tops

Nearby words

aperture-priority, apery, aperçu, apeshit, apetalous, apex, apex beat, apex club, apex pneumonia, apgar, apgar score

Origin of apex

Borrowed into English from Latin around 1595–1605 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for apexes

British Dictionary definitions for apexes (1 of 2)


/ (ˈeɪpɛks) /

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

British Dictionary definitions for apexes (2 of 2)


/ (ˈeɪpɛks) /

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

Word Origin for apex

C17: from Latin: point
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for apexes



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.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for apexes


[ āpĕks ]

n. pl. a•pex•es

The pointed end of a conical or pyramidal structure.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for apexes


[ āpĕks ]

The highest point, especially the vertex of a triangle, cone, or pyramid.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.