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Weekday vs Undefined - What's the difference?

weekday | undefined |

As a noun weekday

is any day of the week except sunday and often also saturday[http://wwwyourdictionarycom/weekday american heritage][http://wwwcollinsdictionarycom/dictionary/english/weekday collins][http://wwwmerriam-webstercom/dictionary/weekday merriam-webster].

As an adjective undefined is

lacking a definition or value.

weekday

English

Noun

(en noun)
  • Any day of the week except Sunday and often also Saturday. American Heritage][http://www.collinsdictionary.com/dictionary/english/weekday Collins][http://www.merriam-webster.com/dictionary/weekday Merriam-Webster
    • In countries with a six-day workweek (including all countries in the past), the weekdays are the same as the workdays (working days). In countries with a five-day workweek, the term weekday sometimes has the old meaning "all days except Sunday" and sometimes refers to "all days except Saturday and Sunday".

    Synonyms

    * workday * working day * (day on which work is done in legal and official usage) business day

    Related terms

    * week * weeknight

    References

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined