Definition of Poa:
(n) :
Any grass of the genus Poa, especially Poa annua.
(n) :
(law) Initialism of power of attorney. [(uncountable, law) The legal authorisation of one person to act as the agent of another.]
(n) :
Initialism of Prison Officers Association.
(n) :
(linguistics) Initialism of place of articulation. [(phonetics, of a consonant) The point of contact, where an obstruction occurs in the vocal tract between an active (moving) articulator (typically some part of the tongue) and a passive (stationary) articulator (typically some part of the roof of the mouth).]
(n) :
Initialism of Prisoner of Azkaban.