Mandelstam, Osip Syllabification: (Man·del·stam, Osip)Pronunciation: /ˈmändlˌstäm, məndyilˈSHtäm/ (also Mandelshtam)Definition of Mandelstam, Osip (1891–1938), Russian poet; a member of the Acmeist group; full name Osip Emilevich Mandelstam. Sent into internal exile in 1934, he died in a prison camp. Notable works: Stone (1913) and Tristia (1922). Mandelstam, Osip in other Oxford dictionaries Definition of Mandelstam, Osip in the British & World English dictionary