nar ‧ cis ‧ sis ‧ m /ˈnɑːsəsɪz ə m, ˈnɑːsɪsɪz ə m $ ˈnɑːr-/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Origin: Narcissus , beautiful young man in an ancient Greek story who loved to look at his face reflected in water and was turned into a flower, from Greek Narkissos ]
when someone is too concerned about their appearance or abilities or spends too much time admiring them – used to show disapproval:
He went to the gym every day, driven purely by narcissism.
—narcissist noun [countable]
—narcissistic /ˌnɑːsəˈsɪstɪk◂, ˌnɑːsɪˈsɪstɪk◂ $ ˌnɑːr-/ adjective