high noon

1 a state or time of great activity, thriving, or achievement the high noon of the whaling industry occurred in the first half of the 19th century Synonyms blossom, florescence, floruit, flower, flush, heyday, bloom, prime, salad days, springtimeRelated Words autumn, Indian summer; blooming, blossoming, efflorescence, flowering; acme, apex, climax, meridian, peak, pinnacle, summit, zenith; glory, grandeur, splendor; belle epoque (or belle époque), golden age, silver age; comeback, recovery, revivialNear Antonyms decay, decline, downfall; bottom, nadir; shriveling (or shrivelling), wilting, withering

2 the highest part or point the exhibition showcased works painted at the high noon of French Impressionism Synonyms acme, apex, apogee, capstone, climax, crescendo, crest, crown, culmination, head, height, high tide, high-water mark, meridian, ne plus ultra, noon, noontime, peak, pinnacle, sum, summit, tip-top, top, zenithRelated Words bloom, blossom, flood tide, flower, glory, heyday, prime; cap, ceiling, roof; extreme, extremity, tip, vertex; high, highlight, highspotNear Antonyms abyss, base, foot; minimumAntonyms bottom, nadir, rock bottom

3 the middle of the day the dedication ceremony began at high noon with a 21-gun salute Synonyms noon, lunch time, midday, noonday, noontide, noontimeRelated Words forenoon, morning; afternoon, evening