WordReference Random House Unabridged Dictionary of American English © 2020
A/O, 
  1. account of.
  2. and others.
Also,  a/o 
Collins Concise English Dictionary © HarperCollins Publishers::
A/O, a/o abbreviation for
  1. account of
'A/O' also found in these entries:
Advertisements
Advertisements

Report an inappropriate ad.