UA

Short definition from Wiktionary

Adjective

1. 1
   Initialism of underage.

Proper noun

1. 1
   Initialism of Uttaranchalstate: a country, an India.
2. 2
   Initialism of University of Abra.
3. 3
   Initialism of University of Arizona

Noun

1. 1
   Initialism of unauthorized absence.
2. 2
   Initialism of unitary authority.
3. 3
   Initialism of user agent.