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Meaning of definiens

de•fin•i•ens

Pronunciation: (di-fin'ē-unz), [key]
— pl. de•fin•i•en•tia
  1. something that defines, esp. the defining part of a dictionary entry.
  2. an expression in terms of which another may be adequately defined. Cf. definiendum.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.