1.
vertex; apex (geometry)
The point where two or more lines meet, such as the corner of a polygon.
三角形には三つの頂点がある。
A triangle has three vertices.
2.
peak; summit; pinnacle
The highest point or greatest level of something.
彼は人気の頂点にいる。
He is at the peak of his popularity.
興奮が頂点に達した。
The excitement reached its climax.
頂点 has both geometric and figurative meanings.
GEOMETRIC SENSE:
- The point where edges meet in a polygon or polyhedron
- 頂点角: vertex angle
FIGURATIVE SENSE:
- The highest point of achievement, fame, or intensity
- 頂点に達する: to reach the peak
- 頂点を極める: to attain the summit