peak, height, climax;
работа в (полном) ~е work is in full swing;
лето в самом ~е summer is at its height
high point; height:
в полном разгаре, в самом разгаре — at its height, in full swing, in the thick of it, in full fling
в разгар сезона — at the height of the season
в разгаре спора — in the heat of the dispute