NeoDict for iPhone.

Available free in the App Store

View
NeoDict for Android.

Available free in the Play Store

View
English Dictionary
▪ duty period▪ duty tour▪ duty-bound▪ duty-free▪ duvet
◊ duty-bound
duty-bound
adj : under a moral obligation to do something [syn: {duty-bound(p)},
{obliged(p)}]