lo ‧ bot ‧ o ‧ my /ləˈbɒtəmi $ ləˈbɑː-/ BrE AmE noun ( plural lobotomies ) [countable]
[ Date: 1900-2000 ; Origin: lobe + -tomy 'cutting' (from Modern Latin -tomia , from Greek temnein 'to cut' ) ]
a medical operation to remove part of someone’s brain in order to treat their mental problems
—lobotomize verb [transitive]