The most extreme possible amount or value:
— Voltage peak.

synonym: extremum.

Dutch: uitschieter
Polish: ekstremum

The period of greatest prosperity or productivity.

synonyms: bloom, blossom, efflorescence, flower, flush, heyday, prime.

Dutch: bloeitijd, hoogtijdagen, bloeiperiode
Polish: szczyt

The highest level or degree attainable; the highest stage of development:
— The peak of perfection.
— Summer was at its peak.

synonyms: acme, elevation, height, meridian, pinnacle, summit, superlative, tiptop, top.

Roget 206: height, altitude, elevation; eminence, pitch; loftiness etc. adj.; sublimity.    tallness etc. adj.; stature, procerity^†; prominence etc. 250.    colossus etc. (size) 192; giant, grenadier, giraffe, camelopard.    mount, mountain; hill alto, butte [U.S.], monticle^†, fell, knap^†; cape; headland, foreland^†; promontory; ridge, hog's back, dune; rising ground, vantage ground; down; moor, moorland; Alp; uplands, highlands; heights etc. (summit) 210; knob, loma^†, pena [U.S.], picacho^†, tump^†; knoll, hummock, hillock, barrow, mound, mole; steeps, bluff, cliff, craig^†, tor^†, peak, pike, clough^†; escarpment, edge, ledge, brae; dizzy height.    tower, pillar, column, obelisk, monument, steeple, spire, minaret, campanile, turret, dome, cupola; skyscraper.    pole, pikestaff, maypole, flagstaff; top mast, topgallant mast.    ceiling etc. (covering) 223.    high water; high tide, flood tide, spring tide.    altimetry etc. (angel) 244^†; batophobia^†.    satellite, spy-in-the-sky.    ... show more

Roget 210: summit, summity^†; top, peak, vertex, apex, zenith, pinnacle, acme, culmination, meridian, utmost height, ne plus utra, height, pitch, maximum, climax, culminating point, crowning point, turning point; turn of the tide, fountain head; water shed, water parting; sky, pole.    tip, tip top; crest, crow's nest, cap, truck, nib; end etc. 67; crown, brow; head, nob^†, noddle^†, pate; capsheaf^†.    high places, heights.    topgallant mast, sky scraper; quarter deck, hurricane deck.    architrave, frieze, cornice, coping stone, zoophorus^†, capital, epistyle^†, sconce, pediment, entablature^†; tympanum; ceiling etc. (covering) 223.    attic, loft, garret, house top, upper story.    [metaphorical use] summit conference, summit; peak of achievement, peak of performance; peaks and troughs, peaks and valleys (in graphs). ... show more

Dutch: overtreffende trap, spits, hoogtepunt, toppunt, top
Polish: kulminacja

The top or extreme point of something (usually a mountain or hill):
— The view from the peak was magnificent.

synonyms: crest, crown, summit, tip, top.

Dutch: bergtop, piek, apex, kruin, top

A V shape.

synonyms: point, tip.

The highest point (of something):
— At the peak of the pyramid.

synonyms: acme, apex, vertex.

Dutch: hoek, knoop, punt, spits, hoogtepunt, top, toppunt
Polish: ciemię

A brim that projects to the front to shade the eyes.

synonyms: bill, eyeshade, visor, vizor.

Dutch: oogscherm
Polish: daszek

To reach the highest point; attain maximum intensity, activity:
— That wild, speculative spirit peaked in 1929.

synonym: top out.

Roget 655: be ill etc. adj.; ail, suffer, labor under, be affected with, complain of, have; droop, flag, languish, halt; sicken, peak, pine; gasp.    keep one's bed; feign sickness etc. (falsehood) 544.    lay by, lay up; take a disease, catch a disease etc. n., catch an infection; break out.    ... show more

Dutch: pieken