noun
apex
AY-pehks
noun
1
The highest point of something, especially where it comes to a point; the peak or pinnacle.
"Climbers reached the apex of the mountain just before sunrise."
"She was at the apex of her career when she decided to retire."
How to Use Apex
Learner’s notesIn plain EnglishThe very top or high point of something — a shape, a career, an achievement.
Common mistake
Plural is "apexes" or the more formal "apices" — both are acceptable.
Common pairings
apex of a triangle
apex predator
reach the apex
Word Forms
apices plural, apexes plural
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “apex”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
Climbers reached the _____ of the mountain just before sunrise.
Etymology
From Latin apex, meaning "point, tip, or summit."