/ Dictionary / Index F finback: Meaning and Definition of Find definitions for: fin•back Pronunciation: (fin'bak"), [key] — n. any baleen whale of the genus Balaenoptera, having a prominent dorsal fin, esp. B. physalus, of the Atlantic and Pacific coasts; rorqual: an endangered species. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: finback (Thesaurus) financing finca Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language