Entry Word: duty

Function: noun

Meaning: 1 a charge usually of money collected by the government from people or businesses for public use <the duty-free shop at the airport> — see tax
2 a piece of work that needs to be done regularly <the regular duties of a lifeguard> — see chore 1
3 something one must do because of prior agreement <I must obey the call of duty and serve my country> — see obligation