Lingo
[draw] a line under {sth}
to decide to put an end to something by dealing with it
The idiom "draw a line under something" likely originates from the act of drawing a line to mark the end of an entry or section in an account book or ledger. In a broader sense, it means to conclude, finalize, or put an end to a particular issue or situation. It suggests that after addressing or acknowledging a problem, one should move forward and not dwell on it any longer.
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