/ Dictionary / Index B birthweight: Meaning and Definition of Find definitions for: birth•weight Pronunciation: (bûrth'wāt"), [key] — n. the weight of an infant at birth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. birth trauma birthwort Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language