From Longman Dictionary of Contemporary Englishcummerbundcum‧mer‧bund /ˈkʌməbʌnd $ -ər-/ noun [countable] DCCa wide piece of cloth that a man wears around his waist as part of a special suit worn on very formal occasions
Examples from the Corpus
cummerbund• Several delegates turned up to the banquet wearing dinner jackets with camouflage bow ties and cummerbunds.• You draped your best cummerbund over the lampshade?• The page wore an ivory silk shirt and trousers with a blue cummerbund.• In green ties, red epaulettes and blue cummerbunds we lined up.• Lionel, in his bright red cummerbund.• After wrestling with it as though I were Laocobn, I gave up altogether on the cummerbund.Origin cummerbund (1600-1700) Urdu kamarband, from Persian, from kamar “waist” + band “band” 