p.o.


(in prescriptions) by mouth.

Origin of p.o.

From the Latin word per ōs

Definition for p.o. (2 of 2)

P.O.


parole officer.
petty officer.
postal (money) order.
post office.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019