per di·em (pər dē'əm, dī'əm) (Abbr. p.d.)
adv.
By the day; per day.

adj.

1. Reckoned on a daily basis; daily.
2. Paid by the day.

n., pl., per diems.
An allowance for daily expenses.

[Latin : per, per + diem, accusative of diēs, day.]

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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