The workday itself (the period of the day between 9 am and 5 pm).
A day job, especially at a large company, emphasizing banality.
One who works in a job from 9 am to 5 pm.
The part of a day in which work is done; the number of hours one must work per day for a specified wage.
Any of those days of a week on which work is done, officially Monday to Friday in many countries (even though many people work on weekends).