aad

noun

  1. 1

    Initialism of active acoustic device.; active acoustical device.

  2. 2

    Initialism of advanced ammunition depot.

  3. 3

    Initialism of alloxazine adenine dinucleotide.

  4. 4

    Initialism of antibiotics-associated diarrhea.

adjective

  1. 1

    Old

    “he's aad codger”

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