/ Dictionary / Index G GRU: Meaning and Definition of Find definitions for: GRU Pronunciation: [key] (in the Soviet Union) the Chief Intelligence Directorate of the Soviet General Staff, a military intelligence organization founded in 1920 and functioning as a complement to the KGB. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Grozny grub Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language