Definition of "forty-eight"

forty-eight

number
1. The cardinal number immediately following forty-seven and preceding forty-nine.
noun
plural forty-eights
1. (US, military) A period of 48 hours' leave, i.e. two days.
  Quotations
  They had their ten-day leaves and regular forty-eights from behind the nets of Bantry Bay and Scapa Flow […]
  1919, Our Navy, the Standard Publication of the U.S. Navy