Nolo's Plain-English Law Dictionary
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- Per Diem
- (per dee-um) Latin for "per day," per diem refers to payment of a set amount for each day's expenses for an employee or agent. Typically, a per diem is available only for travel away from home. For example, someone who goes on an overnight business trip for an employer might receive a per diem of $50 to cover meals and incidentals on the trip.