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·coÂ·pe. n. 1. Grammar The shortening of a word by omission of a sound, letter, or syllable from the middle of the word; for example, bos'n for boatswain. 2. Medicine A brief loss of consciousness caused by inadequate blood flow to the brain.