om ‧ nis ‧ cient /ɒmˈnɪsiənt, -ˈnɪʃ ə nt $ ɑːmˈnɪʃ ə nt/ BrE AmE adjective formal
[ Date: 1600-1700 ; Language: Medieval Latin ; Origin: Latin omni- ( ⇨ ↑ omni- ) + scientia ( , ↑ science ) ]
knowing everything:
the book’s omniscient narrator
—omniscience noun [uncountable]