Aad

//ɑːd// adj, name, noun

adj, name, noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    Initialism of Aircraft Assignment Directive. abbreviation, alt-of, initialism
  2. 2
    Initialism of active acoustic device; active acoustical device. abbreviation, alt-of, initialism
  3. 3
    Initialism of automatic activation device. abbreviation, alt-of, initialism
  4. 4
    Initialism of advanced ammunition depot. abbreviation, alt-of, initialism
  5. 5
    Initialism of Anti-aircraft division. abbreviation, alt-of, initialism
Show 5 more definitions
  1. 6
    Initialism of alloxazine adenine dinucleotide. abbreviation, alt-of, initialism
  2. 7
    Initialism of Army Air Defense. abbreviation, alt-of, initialism
  3. 8
    Initialism of antibiotics-associated diarrhea. abbreviation, alt-of, initialism
  4. 9
    Initialism of Airborne Assault Division. abbreviation, alt-of, initialism
  5. 10
    Initialism of Armored Automobile Detachment. abbreviation, alt-of, historical, initialism
Adjective
  1. 1
    old Geordie

    "He’s aad codger."

Proper Noun
  1. 1
    Initialism of American Academy of Dentists. abbreviation, alt-of, initialism
  2. 2
    Initialism of American Academy of Dermatology. abbreviation, alt-of, initialism
  3. 3
    Initialism of Australian Antarctic Division. abbreviation, alt-of, initialism

    "For the next four or five years, a special drill designed at the AAD will slice through the ice pulling up 3-metre cores at a time until the drill hits bedrock, almost 3km down. […] The idea to go chasing the world’s oldest ice was included in a 2013 report from Dr Tony Press, the former AAD director and Antarctic scientist who set out what Australia’s priorities on the vast continent should be."

  4. 4
    Initialism of Azure Active Directory. abbreviation, alt-of, initialism

Synonyms

All synonyms
ancientantiquatederstwhileagedantiqueauld

Example

More examples

"For the next four or five years, a special drill designed at the AAD will slice through the ice pulling up 3-metre cores at a time until the drill hits bedrock, almost 3km down. […] The idea to go chasing the world’s oldest ice was included in a 2013 report from Dr Tony Press, the former AAD director and Antarctic scientist who set out what Australia’s priorities on the vast continent should be."

Etymology

Etymology 1

Regional form of old (compare auld), from Northern Middle English ald (southern old).

Etymology 2

Initialism.

Related phrases

aad wife

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.