/ Dictionary / Index B block party: Meaning and Definition of Find definitions for: block' par"ty Pronunciation: [key] an outdoor festival, usually held in a closed-off city street, often to raise money for a local organization or for a block association. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. block organization. block plane Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language