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Webster's Dictionary (1865)

Clās'sis, n.

noun

n.; pl. CLĀS'SĒS. [Lat. See CLASS.]

  1. A class or order; sort; kind. [Obs.] “His opinion of that classis of men.” Clarendon.
  2. (Eccl.) An association or convention having juridical power in certain churches; an ecclesiastical judicatory.