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.
Dictionary entry overview: What does synergy mean? â¢ SYNERGY (noun) The noun SYNERGY has 1 sense: 1. the working together of two things (muscles or drugs for example) to produce an effect greater than the sum of their individual effects Familiarity information: SYNERGY used as a noun is very rare.