Main Entry: ¹oh

Variant(s): also O \(ˈ)ō\

Function: interjection

Etymology: Middle English o

Date: 13th century

1 —used to express an emotion (as surprise or desire) or in response to physical stimuli
2 —used in direct address <oh, waiter! Will you come here, please?>
3 —used to express acknowledgment or understanding of a statement
4 —used to introduce an example or approximation