/ Dictionary / Index G GPU: Meaning and Definition of Find definitions for: GPU Pronunciation: [key] General Postal Union. See. GPU Pronunciation: (gā'pā"', jē'pē"y'), [key] (in the Soviet Union) the secret-police organization (1922–23) functioning under the NKVD. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. GPS GQ 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