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 (Greek ÏÏÎ½ÎµÏÎ³Î¯Î± synergia from synergos, ÏÏÎ½ÎµÏÎ³ÏÏ, meaning working together) is a word referring to the emergence of qualities, states, or behavior of whole systems or entities unpredicted by the behavior of their parts taken separately.