What does sheath mean?
A sheath is a protective covering that fits closely around a blade, tool, or other elongated object. The best-known example is the sheath for a sword or knife, but the word is also used in anatomy, biology, and technical description for a surrounding layer or casing. As a verb, sheath means to put something into a sheath, especially to return a blade to its cover. The word can therefore describe both the covering itself and the action of placing an object inside it. Its somewhat formal or literary character makes it especially useful in descriptions of weapons, craftsmanship, anatomy, and protective structures. Although sheath and scabbard overlap in meaning, sheath is broader: a scabbard is specifically a container for a sword or other large blade, whereas a sheath can cover many kinds of narrow objects.
A close-fitting cover or case for a blade, tool, or similar object; also, an enclosing layer in anatomy or biology.
"The sword remained safely inside its sheath."
A scabbard is a specific kind of sheath, especially for a sword or large blade.
To put a blade or similar object into its sheath or enclosing case.
"Sheathing the sword, he turned toward the gate."
The verb is relatively formal and literary; sheath a blade is a common technical collocation.
The plural is formed by adding -s to the noun.
"The cobbler repaired several worn leather sheaths."
From blade to biology, the sheath is a protective sleeve: it can cover a knife, a muscle, or a plant stem.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sheath come from?
Sheath comes from Old English sceþ, meaning a cover or scabbard, and is related to cognates in other Germanic languages, including German Scheide. The verb developed from the same historical root. The older form sheathe survives in literary and archaic usage, while the modern spelling sheath reflects the usual loss of the final e in English.
Related word forms
How sheath is actually used
In its usual sense, sheath is formal or literary but fully standard. The verb is less common than the noun and often appears in descriptions of drawing or returning a blade.