O-Bon
Multiple Entries:O-Bon Bon
Concise Oxford English Dictionary © 2008 Oxford University Press:
O-Bon /əʊˈbɒn/
▶noun another name for Bon.
Concise Oxford English Dictionary © 2008 Oxford University Press:
Bon /bɒn/ (also O-Bon)
▶noun a Japanese Buddhist festival held annually in August to honour the dead.
– origin from Japanese.
'O-Bon' also found in these Oxford entries:

