What does acquaintance mean in the song auld lang syne?

In the song "Auld Lang Syne", the word "acquaintance" refers to a person who is known but not necessarily close friends with someone else. In this context, it suggests a sense of familiarity and nostalgia for a past relationship, even though the connection may not have been particularly deep. The phrase "we'll tak' a cup of kindness yet, for the sake of auld lang syne" expresses a desire to remember and honor the past, despite any differences that may have arisen over time.