IA

Short definition from Wiktionary

Proper noun

1. 1
   Abbreviation of Iowa: a state of the United States.
2. 2
   Initialism of Indian Army.
3. 3
   Initialism of Indian Airlines.
4. 4
   Initialism of Iraqi Army.
5. 5
   Initialism of Intel Architecture.
6. 6
   Initialism of Ice Age.
7. 7
   Initialism of Internet Archive: an American nonprofit digital library website founded in 1996.

Interjection

1. 1
   inshallah; God willing

Noun

1. 1
   Initialism of immediate action, the procedure to determine the cause of a rifle stoppage.
2. 2
   Initialism of Institute of Arts.
3. 3
   Initialism of information assurance.
4. 4
   Initialism of internal affairs, a department responsible for investigating complaints against police officers.
5. 5
   Initialism of individual augmentee.
6. 6
   Initialism of item-and-arrangement.
7. 7
   Initialism of internal argument.
8. 8
   Initialism of international affairs.
9. 9
   Initialism of industrial action.
10. 10
    Initialism of Impact Assessment.
11. 11
    Initialism of industrial arts, one of the strands under the TVL track in senior high school.
12. 12
    Initialism of initial accommodation (for immigrants)