noun

• The highest or the greatest part of something, especially forming a point.
• (geometry) The highest point in a plane or solid figure, relative to a base line or plane.
• (chiefly anatomy) The pointed fine end of something.
• The lowest part of the human heart.
• The deepest part of a tooth's root.
• (botany) The end of a leaf, petal or similar organ opposed to the end where it is attached to its support.
• (botany) The growing point of a shoot.
• (astronomy) The point on the celestial sphere toward which the Sun appears to move relative to nearby stars.
• (physics) The lowest point on a pendant drop of a liquid.
• (mining, US) The end or edge of a vein nearest the surface.
• (typography):
• A diacritic in Classical Latin that resembles and gave rise to the acute.
• A diacritic in Middle Vietnamese that indicates /ŋ͡m/.
• 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".
• (figuratively) The moment of greatest success, expansion, etc.
• (attributive, ecology) The top of the food chain.
• A conical priest cap.
• (aviation) Acronym of advance purchase excursion (an air fare)
• (Britain, trade union) Acronym of Association of Professional, Executive, Clerical and Computer Staff.