- something that is or is to be defined, especially the term at the head of a dictionary entry.
- Logic. an expression to be defined in terms of another expression previously defined.
Origin of definiendum
1870–75; < Latin dēfīniendum, neuter gerund of dēfīnīre; see define
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- something to be defined, esp the term or phrase to be accounted for in a dictionary entryCompare definiens
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012