- a small, often decorative, knifelike instrument with a blade of metal, ivory, wood, or the like, for slitting open envelopes, the leaves of books, folded papers, etc.
- the blade of a paper cutter.
Origin of paper knife
First recorded in 1800–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for paper knife
Wrayson handed her a paper-knife and she cut open the top of the envelope.The Avenger
E. Phillips Oppenheim
I gripped her wrist suddenly and put the paper-knife to her throat.
The paper-knife generally ceased to do duty before the thirtieth page.The Library
She sees on Mouzon's desk the dagger which he uses as a paper-knife.Woman on Her Own, False Gods & The Red Robe
Mr. Locket, grave now, worried with a paper-knife the crevice of a drawer.The Real Thing and Other Tales