What does 'O' mean in ' O king'?

[tulipflower]

In the story of 'The Mouse and the Lion', the mouse says 'O King'. What does 'O' mean?

 

[Charlie Bernstein]

It's an old-fashioned way of writing Oh.

 

[teechar]

Look at entry #2 under "exclamation" in the following link.
https://www.lexico.com/en/definition/o

 

[Charlie Bernstein]

PS - As you know, it helps a lot if you tell us where you found it.

 

[bubbha]

Some languages have a vocative case (used when addressing people by name): it's the English equivalent. But it's pretty old fashioned and poetic sounding.

 

[tulipflower]

We have this case in Persian.

Some languages have a vocative case (used when addressing people by name): it's the English equivalent. But it's pretty old fashioned and poetic sounding.

 

[emsr2d2]

I think you should start addressing tables forthwith, Piscean!