'paperknife' definitions:

Definition of 'paperknife'

From: WordNet
noun
Dull knife used to cut open the envelopes in which letters are mailed or to slit uncut pages of books [syn: letter opener, paper knife, paperknife]

Definition of 'paperknife'

From: GCIDE
  • paperknife \pa"per*knife`\ (p[=a]"p[~e]r*n[imac]f`), n. A dull knife used to cut open the envelopes in which letters are mailed or to slit uncut pages of books.
  • Syn: letter opener. [WordNet 1.5]