Definition of final solutions:
(n) :
(historical, often capitalized) The planned and attempted mass murder of the European Jews by the Nazis; the Holocaust.
(n) :
(by extension) Any similar attempted or successful genocide.
(n) :
Used other than figuratively or idiomatically: see final, solution.
(n) :
Alternative letter-case form of final solution (“attempted mass murder of the Jews by the Nazis”). [(historical, often capitalized) The planned and attempted mass murder of the European Jews by the Nazis; the Holocaust.]