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.
Synergy is the creation of a whole that is greater than the simple sum of its parts. The term synergy comes from the Attic Greek word ÏÏÎ½ÎµÏÎ³Î¯Î± synergia[1] from synergos, ÏÏÎ½ÎµÏÎ³ÏÏ, meaning working together.