/ Dictionary / Index B Big Bertha: Meaning and Definition of Find definitions for: Big' Ber'tha Pronunciation: [key] — Informal. Informal. a large, long-range German cannon used during World War I. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Big Bend National Park Big Board Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language