I found "o'er" in the lyrics of a song, can anyone tell me what that means? The sentance:

"If thou wouldst draw a veil for Me
O'er lengthening scars of age and grief"
draw a veil over ... (in order to cover) ... lengthening scars, etc.
I suppose it means over. What a strong image!
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What would over mean here then? "instead of"?
I might be wrong, but I'd say "covering".
 moijelesuis's reply was promoted to an answer.
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