duty
1 assignment, business, calling, charge, engagement, function, mission, obligation, office, onus, pigeon (informal) province, responsibility, role, service, task, work
2 allegiance, deference, loyalty, obedience, respect, reverence
3 customs, due, excise, impost, levy, tariff, tax, toll
4 do duty for stand in, substitute, take the place of
5 be the duty of behove (archaic) be incumbent upon, belong to, be (someone's) pigeon (Brit. informal) be up to (informal) devolve upon, pertain to, rest with
6 off duty at leisure, free, off, off work, on holiday
7 on duty at work, busy, engaged, on active service