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apex
noun
The highest or topmost point of something; the peak, summit, or culminating point of achievement, development, or intensity. Often refers to the pointed tip of a geometric figure or the climactic moment of a process.
Etymology
Origin: Latin
Root: apex (point, tip, summit) — "away from, separate, at the farthest point"
Example
"The young scientist reached the apex of her career when she won the Nobel Prize at thirty-five."
Usage Notes
Apex carries formal, technical connotations and is often used in academic, scientific, or professional contexts. More precise than 'top' or 'peak.' Common in geometry (apex of triangle), architecture (apex of roof), and metaphorical usage (apex of career). Avoid in casual conversation where 'top' or 'peak' would be more natural. Register: formal to technical.