Etymology
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cosher (v.)

"to extort entertainment from, to levy extractions upon," 1630s, apparently a phonetic spelling of Irish coisir "feast, entertainment." Related: Coshering (1570s).

updated on April 04, 2018

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Definitions of cosher from WordNet

cosher (adj.)
conforming to dietary laws;
Synonyms: kosher
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.