/ Dictionary / Index A asternal: Meaning and Definition of Find definitions for: a•ster•nal Pronunciation: (ā-stûr'nl), [key] — adj. Anat., Zool. not reaching to or connected with the sternum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: asternal (Thesaurus) astern asteroid Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language