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American Dictionary of the English Language

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Sheath


SHEATH, noun

1. A case for the reception of a sword or other long and slender instrument; a scabbard. A sheath is that which separates, and hence a defense.

2. In botany, a membrane investing a stem or branch, as in grasses.

3. Any thin covering for defense; the wing-case of an insect.

SHEATH, verb transitive