Definition of ago:
past (part of speech: adjective)
- "Garrison's Finish A Romance of the Race-Course", W. B. M. Ferguson.
" I dare say I have, long ago- but I have forgotten it.- "The Complete Historical Romances of Georg Ebers", Georg Ebers.
Yes, he had seen a black and white dog going in alone over an hour ago.- "Edgar Saltus: The Man", Marie Saltus.