/ Dictionary / Index L L.H.D.: Meaning and Definition of Find definitions for: L.H.D. Pronunciation: [key] Doctor of Humane Letters. Doctor of Humanities. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. l.h.b. L-head engine Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language