What does plier mean?
A plier is one of the two gripping jaws of a hand tool used to hold, bend, twist, or cut materials such as wire, cable, and small components. In everyday English, however, people normally say "pliers" when referring to the whole tool, and expressions such as "a pair of pliers" are especially common. The singular "plier" is therefore relatively uncommon and may instead emphasize an individual jaw or the two halves of a hinged mechanism. Pliers vary in design according to their purpose: needle-nose pliers reach into confined spaces, wire-cutting pliers include sharpened cutting edges, and locking pliers clamp tightly onto an object. The word is used in both British and American English, with no significant regional distinction in its general meaning.
A hinged hand tool with two jaws for gripping, bending, twisting, or cutting wire and similar materials; the complete tool is normally called "pliers."
"He gripped the cable with the plier and turned it carefully."
The plural "pliers" is overwhelmingly more common when referring to the whole tool.
One of the two jaws or gripping parts of a plier-like tool.
"The upper plier closed before the lower one."
This sense is less common in general usage and occurs especially in technical descriptions.
The usual plural refers to the complete two-handled tool, while "pliers" is also regularly used with "a pair of."
"A pair of pliers is all she needs to cut the cable."
The word "plier" is rarely used alone: one of the two hinged halves is a plier, but the familiar tool is generally called "pliers."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does plier come from?
The word comes from "ply," meaning to bend, fold, or work repeatedly with something, combined with the agent suffix "-er." Its ultimate root is Latin plicare, meaning "to fold" or "bend," which also underlies words such as "apply," "imply," and "pliant." The development from a general idea of bending or working to the name of a gripping tool reflects the tool's use in bending and manipulating wire or metal.
Related word forms
How plier is actually used
In modern English, "pliers" is the usual term for the complete tool. Although "plier" can refer to one of its two jaws, singular usage is uncommon outside technical, descriptive, or historical contexts.