/ Dictionary / Index I intercostal: Meaning and Definition of Find definitions for: in•ter•cos•tal Pronunciation: (in"tur-kos'tl, -kô'stl), [key] — adj. pertaining to muscles, parts, or intervals between the ribs. situated between the ribs. noting a structural member situated between or divided by continuous members, as frames or keelsons. —n. an intercostal muscle, member, or space. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: intercostal (Thesaurus) intercooler intercourse Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language