wai·wai \ˈwīˌwī\noun alsowoy·a·waiorwoy·a·way\ˈwȯiəˌwī\ (pluralwaiwaiorwaiwais) Usage: usually capitalized 1. a.: a Cariban people of the borderlands of Brazil, British Guiana, and Surinam b.: a member of such people 2.: the language of the Waiwai people