I. o ‧ ver ‧ work 1 /ˌəʊvəˈwɜːk $ ˌoʊvərˈwɜːrk/ BrE AmE verb [intransitive and transitive]
to work too much or to make someone work too much:
You’ve been overworking – why don’t you take a week off?
Have they been overworking you again?
II. overwork 2 BrE AmE noun [uncountable]
too much hard work:
a heart attack brought on by overwork