I. ˈpēˈā noun
( plural PA's or PAs -āz)
Etymology: from PA, abbreviation of public address
: the amplifier of a public-address system
the PA of each ship had its own peculiar tone — K.M.Dodson
II. abbreviation
1. often not capitalized participial adjective
2. particular average
3. passenger agent
4. often not capitalized per annum
5. post adjutant
6. power amplifier
7. power of attorney
8. prefect apostolic
9. often not capitalized press agent
10. press association
11. private account
12. prothonotary apostolic
13. public address
14. public administration; public assistance
15. purchasing agent
III. noun
Etymology: from PA , abbreviation of physician's assistant
: physician's assistant herein
IV. abbreviation
personal assistant