/ Dictionary / Index B base map: Meaning and Definition of Find definitions for: base' map" Pronunciation: [key] an outline map of an area to which specific information is added for any of various purposes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. baseman basement Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language