HyperDic: line_of_duty

English > 1 sense of the expression *line of duty*:
NOUN	act	line of duty	all that is normally required in some area of responsibility

English > *line of duty*: 1 sense > noun 1, act
Meaning	All that is normally required in some area of responsibility.
Broader	duty, responsibility, obligation	The social force that binds you to the courses of action demanded by that force