/ Dictionary / Index H hypothecate: Meaning and Definition of Find definitions for: hy•poth•e•cate Pronunciation: (hī-poth'i-kāt", hi-), [key] — -cat•ed, -cat•ing. to pledge to a creditor as security without delivering over; mortgage. to put in pledge by delivery, as stocks given as security for a loan. hy•poth•e•cate Pronunciation: (hī-poth'i-kāt", hi-), [key] — -cat•ed, -cat•ing. hypothesize. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hypothecate (Thesaurus) hypothecary hypothecium Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language