Rare; chiefly figurative and in motorsport contexts.
The festival apexed with a spectacular fireworks display.
Le festival a culminé avec un spectacle de feux d'artifice spectaculaire.
Used chiefly attributively (e.g., "apex court", "apex predator"); generally treated as non-gradable.
The apex court is the nation's final court of appeal.
La cour suprême est la dernière instance d'appel du pays.