æ

Short definition from Wiktionary

Character

1. 1
   The letter ash, a ligature of vowels a and e.
2. 2
   A ligature of vowels A and E, called ash.
3. 3
   aevum; formerly used on gravestones to indicate the deceased's age at time of death

Proper noun

1. 1
   The pseudonym of the Irish writer George William Russell.