aad

adjective1

1. •
   old

   • He’s aad codger.

noun4

1. •
   Initialism of antibiotics-associated diarrhea.
2. •
   Initialism of active acoustic device; active acoustical device.
3. •
   Initialism of advanced ammunition depot.
4. •
   Initialism of alloxazine adenine dinucleotide.

noun6

1. •
   Initialism of automatic activation device.
2. •
   Initialism of Anti-aircraft division.
3. •
   Initialism of Army Air Defense.
4. •
   Initialism of Airborne Assault Division.
5. •
   Initialism of Aircraft Assignment Directive.
6. •
   (historical) Initialism of Armored Automobile Detachment.