the.com/glam rock

means A early-1970s rock subgenre built on theatrical androgyny, glitter, and spectacle, where the performance of image mattered as much as the music.

from Glam is simply a clipped, punchier form of 'glamour,' a word that itself traces back to a Scots alteration of 'grammar' — because in earlier centuries, learning and books were associated with occult knowledge and enchantment, so 'glamour' first meant a magic spell cast over the eyes. By the 20th century it had settled into meaning alluring, theatrical beauty, and when British musicians in the early 1970s piled on sequins, platform boots, and makeup to escape rock's denim earnestness, 'glam rock' named itself almost automatically.