Breadcrumb Home > Dictionary > Index B blue shark: Meaning and Definition of Find definitions for: blue' shark' Pronunciation: [key] a slender, pelagic shark, Prionace glauca, that is indigo blue above, shading to white below. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. blues blue sheep ✖ Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language