lang synePronunciation: /laŋ ˈsʌɪn/ Scottish archaicDefinition of lang syne adverb in the distant past:we talked of races run lang syne noun [mass noun] times gone by: the happy lang syneOrigin: early 16th century: from lang, Scots variant of long1 + synelang syne in other Oxford dictionaries Definition of lang syne in the US English dictionary
