Schlesinger schle·sin·ger US/ˈʃlɛsɪndʒɜr/ uncommon noun 1. United States historian and advisor to President Kennedy (born in 1917) SynonymsArthur SchlesingerArthur Schlesinger Jr.Arthur Meier Schlesinger Jr. 2. United States historian (1888-1965) SynonymsArthur SchlesingerArthur Meier Schlesinger Related words Broader terms historian WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.