langsyne

lang·syne also lang syne  (lng-zn) Scots

adv.

Long ago; long since.

n.

Time long past; times past.

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[Scots lang syne, from Middle English lang sine : long, lang, long; see long¹ + sine, since (contraction of sithen, sithens; see since).]

Thesaurus

Noun	1.	langsyne - past times remembered with nostalgia auld langsyne, good old days, old times past, past times, yesteryear - the time that has elapsed; "forget the past"
Adv.	1.	langsyne - at a distant time in the past (chiefly Scottish) Scotland - one of the four countries that make up the United Kingdom of Great Britain and Northern Ireland; located on the northern part of the island of Great Britain; famous for bagpipes and plaids and kilts