/ ˈkʌməbʌnd; NAmE -mərb-/ noun
a wide band of silk, etc. worn around the waist, especially under a dinner jacket
••
WORD ORIGIN
early 17th cent.: from Urdu and Persian kamar-band , from kamar waist, loins and -bandi band. The sash was formerly worn in the Indian subcontinent by domestic workers and low-status office workers.