Medical Definition of narcissistic personality disorder. : a personality disorder characterized especially by an exaggerated sense of self-importance, persistent need for admiration, lack of empathy for others, excessive pride in achievements, and snobbish, disdainful, or patronizing attitudes.
For the purposes of sym metry, letâs now move on to the most common variant of syn- , or sym- , which also means âtogether.â A sym phony is the sounding âtogetherâ of many instruments.
synâ¢onâ¢yâ¢mous. having the character of synonyms or a synonym; expressing or implying the same idea. synÅnymus syná¹nymos = syn-syn - + -Ånymos; see-onym, -ous ]. synâ¢onâ²yâ¢mousâ¢ly, adv.ynonymous. adj. 1. (often foll by with) being a synonym (of). 2. (foll by: with) closely associated (with) or suggestive (of): his name was synonymous with greed.