postscript
US /ˈpoʊst.skrɪpt/
UK /ˈpoʊst.skrɪpt/
1.
an additional remark at the end of a letter, after the signature and introduced by 'PS.'
:
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She added a humorous postscript to her letter.
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Don't forget to read the postscript; it contains important information.
2.
an additional statement or event that provides further information or a conclusion to something that has already happened
:
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The final chapter served as a fitting postscript to the entire series.
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His unexpected resignation was a dramatic postscript to a long career.