iguecommon nounEtymologyexpandfrom Occitan iga, sinkhole, ravine (Quercy, Rouergue) then "karstic depression", from pre-Latin *ika, "ravine".Definition1. Natural cavity carved in limestone by runoff water. see avenflags.expandCette igue a longtemps servi à un affineur de fromage.Pluraligues