I. noun 1. the top or highest part of something, especially one forming a point • the apex of the roof
‹figurative› the central bank is at the apex of the financial system.
[Geometry] the highest point in a plane or solid figure, relative to a base line or plane.
[Botany] the growing point of a shoot.
4. the highest point of achievement; a climax • the apex of his career was in 1966 when he hoisted aloft the World Cup for England.
[Motor Racing] the point in turning a corner when the vehicle is closest to the edge of the track.
II. verb 1. [no obj.] — reach a high point or climax. • melodic lines build up to the chorus and it apexes at the solo.
2. [with obj.] —
[Motor Racing] turn (a corner) very close to the edge of the track.
• he understands when to apex a corner.
– origin early 17th cent.: from Latin, ‘peak, tip’.