(In plural) the part of the day (typically) spent at work; (later also) the amount of time spent at work; (in singular) an hour during which work is done.
Origin
Late 18th century; earliest use found in Acts of Parliament.
Definition of work hour in US English:
work hour
noun
(In plural) the part of the day (typically) spent at work; (later also) the amount of time spent at work; (in singular) an hour during which work is done.
Origin
Late 18th century; earliest use found in Acts of Parliament.