Plu ‧ tarch /ˈpluːtɑːk $ -ɑːrk/ BrE AmE
(?46-?120 AD) an ancient Greek ↑ historian who wrote about famous Greek and Roman politicians and military leaders in a book known as Plutarch's Lives . Plays by William ↑ Shakespeare that are set in ancient times, such as Julius Caesar , are based on Plutarch's writings.