/ Dictionary / Index P PUC: Meaning and Definition of Find definitions for: PUC Pronunciation: [key] Public Utilities Commission. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. publishment puca Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language