1. Past times remembered with nostalgia
   - auld langsyne, old times, good old days

1. At a distant time in the past (chiefly Scottish)

1. Of the distant or comparatively distant past
   "lang syne"
   - long ago, long since

Derived forms: langsynes

Type of: past, past times, yesteryear

• complex instruction set computer
• complex instruction set computing
• complex number
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• complexifier
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• compliment