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.
â¢ SYNERGISTIC (adjective). The adjective SYNERGISTIC has 3 senses: 1. used especially of drugs or muscles that work together so the total effect is greater than the sum of the two (or more). 2. of or relating to the theological doctrine of synergism. 3. working together; used especially of groups, as subsidiaries of a corporation, cooperating for an enhanced effect. Familiarity information: SYNERGISTIC used as an adjective is uncommon.