n. 1 top, pinnacle, crest, ridge, tor, mountain top, summit, mountain, eminence, elevation, hill We were just able to make out the snow-capped peaks in the distance 2 top, tip, tiptop, apex, acme, culmination, apogee, zenith, high point, crown, extreme, utmost, uttermost, perfection, ne plus ultra, consummation, climax Irene has brought the office to a peak of efficiency 3 visor, brim, US bill, nib The peak of the fisherman's cap serves as an eyeshade
v. 4 rise, crest, culminate, (reach a) climax, top (out) Prices peaked during the Christmas shopping season