au

Short definition from Wiktionary

Noun

1. 1
   Abbreviation of atomic unit.
2. 2
   Abbreviation of arbitrary unit.
3. 3
   Abbreviation of astronomical unit.
4. 4
   Abbreviation of Absorbance Units.
5. 5
   A vowel found in Indic abugidas.
6. 6
   Initialism of alopecia universalis.
7. 7
   Initialism of astronomical unit.
8. 8
   Initialism of angstrom unit.
9. 9
   Initialism of alternate universe /alternative universe.
10. 10
    Initialism of arbitrary unit.

Adjective

1. 1
   Initialism of almost uncirculated.

Proper noun

1. 1
   Initialism of African Union.
2. 2
   Initialism of Age of Ultron.
3. 3
   A language spoken in Sandaun Province, Papua New Guinea.
4. 4
   A surname.

Symbol

1. 1
   Chemical symbol for gold.