1. the act or process of writing or inserting text between the lines of a document or manuscript
2. text that has been written or inserted between the lines of a document

Examples

• The scholar's interlineation in the margin clarified an ambiguous passage.
• Medieval manuscripts often contain interlineations made by later readers and editors.
• The editor made several interlineations to correct errors in the original text.
• Interlineation was a common practice before the invention of the printing press.
• The document's authenticity was questioned due to suspicious interlineations.
• She used interlineation to add important notes without rewriting the entire page.