Definitions from Wiktionary ( )

▸ noun:  The highest or the greatest part of something, especially forming a point.
▸ noun:  (geometry) The highest point in a plane or solid figure, relative to a base line or plane.
▸ noun:  (chiefly anatomy) The pointed fine end of something.
▸ noun:  The lowest part of the human heart.
▸ noun:  The deepest part of a tooth's root.
▸ noun:  (botany) The end of a leaf, petal or similar organ opposed to the end where it is attached to its support.
▸ noun:  (botany) The growing point of a shoot.
▸ noun:  (astronomy) The point on the celestial sphere toward which the Sun appears to move relative to nearby stars.
▸ noun:  (physics) The lowest point on a pendant drop of a liquid.
▸ noun:  (mining, US) The end or edge of a vein nearest the surface.
▸ noun:  (typography):
▸ noun:  A diacritic in Classical Latin that resembles and gave rise to the acute.
▸ noun:  A diacritic in Middle Vietnamese that indicates /ŋ͡m/.
▸ noun:  A sharp upward point formed by two strokes that meet at an acute angle, as in "W", uppercase "A", and closed-top "4", or by a tapered stroke, as in lowercase "t".
▸ noun:  (figuratively) The moment of greatest success, expansion, etc.
▸ noun:  (attributive, ecology) The top of the food chain.
▸ noun:  A conical priest cap.
▸ noun:  (aviation) Acronym of advance purchase excursion (an air fare)
▸ noun:  (medicine, nephrology) Acronym of accelerated peritoneal equilibration examination.
▸ noun:  (British, trade union) Acronym of Association of Professional, Executive, Clerical and Computer Staff.

---

▸ Word origin

▸ Words similar to apex
▸ Usage examples for apex

▸ Idioms related to apex
▸ Wikipedia articles (New!)
▸ Popular adjectives describing apex
▸ Words that often appear near apex
▸ Rhymes of apex

▸ Invented words related to apex