I. interjection
or o ˈō(ō)
Usage: usually capitalized when spelled o
Etymology: Middle English o
1. — used to express various emotions (as astonishment, pain, or desire)
2. — used in direct address
Oh, porter! Come here, please
II. ˈō noun
or o
( -s )
Usage: usually capitalized when spelled o
Etymology: o (I) ; from the similarity of the symbol for zero (0) to the letter O
: zero
the number is three six oh seven (3607)