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This page is about the meanings of the acronym/abbreviation/shorthand PP in the Miscellaneous field in general and in the Unit Measures terminology in particular. Per Person. Miscellaneous Â» Unit Measures. Rate it: (4.00 / 4 votes).his page is about the meanings of the acronym/abbreviation/shorthand PP in the Miscellaneous field in general and in the Unit Measures terminology in particular. Per Person. Miscellaneous Â» Unit Measures. Rate it: (4.00 / 4 votes).
Legal Definition of per diem. 1  1 : a daily allowance received a per diem for expenses. 2  2 : a daily fee paid a per diem for maintenance of the equipment.