(US, military) A period of 48 hours' leave, i.e. two days.

The cardinal number immediately following forty and preceding forty-two.

The cardinal number immediately following forty-five and preceding forty-seven.

The cardinal number immediately following forty-three and preceding forty-five.

(slang) A .44 Magnum handgun

Alternative form of 49er (in various senses)

quadragesimo-octavo (as a paper size in printing).

The ordinal form of the number forty-eight, describing a person or thing in position number 48 of a sequence.

One of forty-eight equal parts of a whole.

The ordinal form of the number forty-nine, describing a person or thing in position number 49 of a sequence.