'Workday' definitions:

Definition of 'workday'

From: WordNet
noun
A day on which work is done [syn: workday, working day, work day] [ant: day of rest, rest day]
noun
The amount of time that a worker must work for an agreed daily wage; "they work an 8-hour day" [syn: workday, working day]

Definition of 'Workday'

From: GCIDE
  • Workday \Work"day`\, n. & a. [AS. weorcd[ae]g.] A day on which work is performed, as distinguished from Sunday, festivals, etc., a working day. [1913 Webster]