apex
n.-
1 highest physical point (n.) C1 Advanced Formalthe top or highest part of something, especially when it forms a point.
the vertex or highest point of a physical structure, such as a mountain, building, or geometric shape.
ExampleThe climbers finally reached the apex of the mountain just before noon.
ExampleThe architect designed the roof so that its apex would align perfectly with the position of the North Star during the winter solstice.
UsageOften used with 'of' to describe the top of a specific structure.
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2 highest level of success (n.) C1 Advanced Formalthe most successful or powerful part of a career, life, or story.
the figurative peak or climax of a career, historical period, or developmental process.
ExampleWinning the world championship was the apex of her sporting career.
ExampleHistorians often debate whether the empire reached its apex during the third century or if its decline had already begun by then.
- nadir
- low point
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3 top of a hierarchy (n.) C1 Advanced Technical Academic Sciencethe highest level of a system, such as the top of the food chain.
the highest position in a hierarchical system or ecological structure.
ExampleAs an apex predator, the lion has no natural enemies in the wild.
ExampleThe study examines how the removal of an apex predator can cause a collapse in the lower levels of the local ecosystem.
UsageFrequently used as a modifier in the phrase 'apex predator'.
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4 racing line (n.) C2 Proficiency Technical Sportthe point in a corner where a racing car is closest to the inside edge.
the point in a curve or corner where a vehicle is closest to the inside edge of the track, allowing for maximum speed.
ExampleThe driver missed the apex of the turn and lost several seconds.
ExampleMastering the ability to hit the apex consistently is what separates professional racing drivers from amateurs on this technical circuit.
- clipping point
Borrowed from Latin apex (“point, tip, summit”).