It's really not unusual for an adjective to be used to mean "thing described by this adjective". Laptop (computer). Roguelike (computer game). A glass of the h

It's really not unusual for an adjective to be used to mean "thing described by this adjective". Laptop (computer). Roguelike (computer game). A glass of the house red (wine). Tabloid (newspaper). Convertible (car). Mobile/cell (phone), though these days people usually just say "phone". Etc.