/ Dictionary / Index B butternut squash: Meaning and Definition of Find definitions for: but'ternut squash' Pronunciation: [key] a yellowish winter squash having sweet, orange-colored flesh. the plant bearing this fruit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. butternut butter of arsenic Related Content Daily Word Quiz: gossamer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language