peak-n; 4 Senses

Sense Number 1: mountaintop

Commentary: peak, crown, crest, top, tip, summit - the top point of something

The view from the peak was magnificent.
They clambered to the summit of Monanock.
At the peak of the pyramid.

WordNet 2.0 Sense Numbers: 4 6

Sense Number 2: highest level

Commentary: extreme, peak, flower, prime, peak, heyday, bloom, blossom, efflorescence, flush, acme, height, elevation, pinnacle, summit, superlative, top - the highest level or degree attainable; the period of greatest prosperity or productivity; the most extreme possible amount or value

voltage peak...
The peak of his career was in the 1960s.
His landscapes were deemed the peak of beauty.
The artist's gifts are at their peak.
At the peak of her career she was mediocre at best.
The peak of perfection...
Summer was at its peak.
...catapulted Einstein to the peak of fame.
The peak of his ambition lasted through his retirement.
So many peaks achieved by man...
At the peak of his performance he was the best.

WordNet 2.0 Sense Numbers: 1 3 2

Sense Number 3: V shape

Commentary: point, tip, peak - a V shape

The cannibal's teeth were filed to sharp points.

WordNet 2.0 Sense Numbers: 5

Sense Number 4: brim

Commentary: bill, peak, eyeshade, visor, vizor - a brim that projects to the front to shade the eyes

He pulled down the bill of his cap and trudged ahead.

WordNet 2.0 Sense Numbers: 7