/ Dictionary / Index P perestroika: Meaning and Definition of Find definitions for: pe•re•stroi•ka Pronunciation: (per"u-stroi'kuRuss.pyi-ryi-stroi'ku), [key] the program of economic and political reform in the Soviet Union initiated by Mikhail Gorbachev in 1986. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: perestroika (Thesaurus) Peres Peretz Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language