duty bound

An act or a course of action that is required of one by position, social custom, law, or religion: Do your duty to your country.

1. Moral obligation: acting out of duty.

2. The compulsion felt to meet such obligation.

3. The work performed by a machine under specified conditions.

4. A measure of efficiency expressed as the amount of work done per unit of energy used.

A service, function, or task assigned to one, especially in the armed forces: hazardous duty.

Function or work; service: jury duty. See Synonyms at function.

A tax charged by a government, especially on imports.

1. The work performed by a machine under specified conditions.

2. A measure of efficiency expressed as the amount of work done per unit of energy used.

The total volume of water required to irrigate a given area in order to cultivate a specific crop until harvest.