1. consisting of or existing as one person only.
  2. Grammar. (of a verb) used in only one person, especially the third person singular; impersonal.

Origin of unipersonal

First recorded in 1800–10; uni- + personal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for unipersonal


  1. existing in the form of only one person or beingCompare tripersonal
  2. (of a verb) existing or used in only one person; for example, rain is used only in the third person
Derived Formsunipersonality, noun
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