What does penknife mean?
A penknife is a small knife intended to be carried conveniently, usually in a pocket, and often fitted with one or more folding blades. It can serve practical purposes such as cutting cord, sharpening a pencil, trimming food, or opening a package. The word also has a historical connection with writing: before fountain pens and ballpoint pens became widespread, pens were commonly made from quills, and a small knife was sometimes used to cut or sharpen the feather. In modern usage, the historical association has largely faded, and “penknife” usually denotes a compact pocketknife rather than a specialized writing implement. Although it is somewhat associated with older, traditional terminology, the word remains perfectly natural in contemporary British and American English. The expression can also convey a modest, old-fashioned or practical quality, as in the familiar image of someone using a penknife to pare an apple or open a parcel.
nounA small knife, especially one designed to be carried in a pocket. Historically, the term referred to a knife used for cutting or sharpening quill pens.
- A small knife carried in a pocket, often with folding blades.
- Historically, a small knife used for cutting or sharpening quill pens.
"He opened his penknife and carefully pared away the skin of the apple."
"She kept a small penknife in her bag for cutting thread."
"In the historical novel, the scholar used his penknife to sharpen a quill."
The plural is formed by changing “-knife” to “-ves,” while retaining the stress on the first syllable.
"The guide carried several sharp penknives in her jacket."
Before ballpoints were common, a “pen” could mean a quill—and a small knife helped prepare it for writing.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does penknife come from?
“Penknife” dates from the early modern period, when a small knife was used to prepare quill pens by cutting or sharpening them. Its first element “pen” ultimately comes through Old French from Latin penna, meaning “feather” or “wing,” while “knife” comes from Old English cnif. The compound later broadened in meaning to denote a small portable knife, with “pocketknife” becoming the more common modern term in many contexts.
How penknife is actually used
The word is ordinary and unremarkable in British English and is also used in American English, where pocketknife may be more frequent. Its older literary sense can appear in historical writing.
Easily confused with penknife
A penknife is a small portable knife, while a jackknife may be a larger folding knife in traditional British usage, although American English often uses the terms interchangeably.