I. ə-ˈnän adverb
Etymology: Middle English, from Old English on ān, from on in + ān one — more at on , one
Date: before 12th century
1. archaic : at once : immediately
2. : soon , presently
tomorrow will be here anon — Nathaniel Hawthorne
3. : after a while : later
more of that anon
II. abbreviation
anonymous; anonymously