Glam is a short, informal cutting-down of glamour. As a describing word, it means a look that is shiny, stylish, and a bit showy — attractive in the way that belongs with fame, money, and a night out, not with a quiet Tuesday. People say a glam dress, glam makeup, a glam party. As a noun, the glam is that whole shiny style. There is also glam rock: 1970s pop where singers wore makeup, glitter, and wild clothes on purpose. It is a fashion, magazine, and music word. Friends use it; a careful school essay usually wants glamour or glamorous instead. It can sound admiring or a little teasing, depending on the voice.