GNU Collaborative International Dictionary of English

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1.       
   Sept (?), n. [A corruption of sect, n.] A clan, tribe, or family, proceeding from a common progenitor; -- used especially of the ancient clans in Ireland.
   
   [1913 Webster]
   
   The chief, struck by the illustration, asked at once to be baptized, and all his sept followed his example. S. Lover.
   
   [1913 Webster]