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Definition of sheath noun from the Oxford Advanced Learner's Dictionary

sheath

noun
 
/ʃiːθ/
 
/ʃiːθ/
(plural sheaths
 
/ʃiːðz/
 
/ʃiːðz/
)
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  1. a cover that fits closely over the blade (= sharp part) of a knife or other sharp weapon or tool
    • He put the dagger back in its sheath.
    • His sword was still in its sheath.
  2. any layer that covers and fits closely over something for protection
    • the sheath around an electric cable
    Extra Examples
    • The wire has an outer sheath of copper.
    • The cable is protected by a strong plastic sheath.
  3. (British English)
    (also condom British and North American English, North American English or specialist prophylactic)
    a thin rubber tube that a man wears over his penis during sex to stop a woman from becoming pregnant or to protect against disease
  4. a woman’s dress that fits the body closely
    • a simple black silk sheath
  5. Word OriginOld English scǣth, scēath ‘scabbard’, of Germanic origin; related to Dutch schede, German Scheide, also to the verb shed.
See sheath in the Oxford Advanced American DictionarySee sheath in the Oxford Learner's Dictionary of Academic English

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