Similar words: butcher knife, butter knife, knife, penknife, fish knife, jack-knife, jackknife, knife edge. Meaning: ['peɪpə(r)‚naɪf] 
n. dull knife used to cut open the envelopes in which letters are mailed or to slit uncut pages of books.
n. dull knife used to cut open the envelopes in which letters are mailed or to slit uncut pages of books. 
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(1) She tore open the envelope, ignoring the paper knife Penman laid ready for her each day.
(2) The blade of the paper knife of the utility model is convenient to change.
(3) The paper knife with infrared display has the advantages that the position of the paper knife is displayed, so files or photos can not be cut slantways in cutting.
(4) Trolleys, nutcracker, bottle opener, paper knife is such a lever.
(5) While we sluice, the manager played with a carved paper knife.
(6) The safety screw is one of the most important parts of the paper knife.
(7) Don't you remember we once ate potted shrimps with a paper knife?
More similar words: butcher knife, butter knife, knife, penknife, fish knife, jack-knife, jackknife, knife edge, knife-edge, bowie knife, bread knife, putty knife, steak knife, pocket knife, paring knife, pocketknife, carving knife, paper tape, paper, conifer, papery, papers, manifest, on paper, manifesto, wallpaper, newspaper, paper cup, wax paper, art paper.