/ Dictionary / Index D D.L.S.: Meaning and Definition of Find definitions for: D.L.S. Pronunciation: [key] Doctor of Library Science. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dls (Thesaurus) dlrs. dlvy. Related Content Daily Word Quiz: bungled Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language