Definition of day's work in US English:

day's work

noun

  • 1The work of a day; (an amount of) work done on or appropriate to a day.

  • 2"all in a (also his, the,etc.) day's work": (of a task, experience, etc.) accepted or expected as part of a person's normal duty or routine. Often used ironically.

  • 3Agriculture. As a unit of area: = "daywork". Now historical.

Origin

Old English. From the genitive of day + work.

Pronunciation

day's work

/deɪz ˈwəːk/