See Also:

O(2) (iou)



O interjection. ME.
[Natural exclam.]
Expr. appeal, surprise, lament, etc. Freq. before a name in the vocative. arch. ME.
O be joyful: see JOYFUL 1.
Bible (AV): Psalms 147:12 Praise the Lord, O Jerusalem. I. Watts But O! how exceedingly difficult it is. Tennyson O for the touch of a vanished hand.
Appended to lines in ballads and other popular verse for metrical reasons. Cf. -A4. Chiefly Scot. E18.