| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
A tax charged by a government, especially on an import.
duty
In addition to the idiom beginning with duty, also see above and beyond (the call of duty); active duty do one's duty; double duty; off duty; on duty.