- the tip, point, or vertex; summit.
- climax; peak; acme: His election to the presidency was the apex of his career.
- solar apex.
- a type of international airfare offering reduced rates for extended stays that are booked in advance.
- the highest point; vertex
- the pointed end or tip of something
- a pinnacle or high point, as of a career, etc
- 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
- 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
