duty /duti/ n. -ties 1
[C;U] responsibility, obligation: Her duty is to see that the business runs well. 2
[U] special service: jury duty, military duty 3
[C;U] a tax, esp. on imported goods See: duty-free. 4 on or off duty: working or not working (in a position of responsibility): A police officer usually wears a uniform when on duty. Thesaurus: duty 1
assignment, job, mission, charge 3
an assessment, tariff.