/ Dictionary / Index H hdkf.: Meaning and Definition of Find definitions for: hdkf. Pronunciation: [key] handkerchief. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hdbk. HDL Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language