POO

Noun

 * 1) * 1856 June 28, John Addington Symonds, letter in Letters, Vol. I, p. 75:
 * Thank Papa very much for the P.O.O. which I got cashed without difficulty.
 * Thank Papa very much for the P.O.O. which I got cashed without difficulty.

Noun

 * 1)  (OOP)