polio UK /ˈpəʊljəʊ/US /ˈpoʊlioʊ/ noun2 •(informal) A person who has poliomyelitis.They don't need social service workers running back and forth every month or two to see if the polios are playing stickball in the street because they never will. — 1977 •Abbreviation of poliomyelitis. formspolios