Meanings of langsyne in English

In Norroway, langsyne, there lived a certain lady, and she had three dochters.

Or the thraldom of the people in "the days of auld langsyne?"

It was langsyne in the black Moderate days, and the Socinians were great in the land.

P'r'aps you'd like best to work here to-night, for company-'forauld langsyne, my boys;' and I'll introduce yer to the gents up-stairsto-morrow.

'Ah, but the lairds lived there langsyne; that's Ellangowan Auld Place.

'Tak' a drap o' kindness yet, for auld langsyne?