/ Dictionary / Index O open-end mortgage: Meaning and Definition of Find definitions for: o'pen-end' mort"gage Pronunciation: [key] a mortgage agreement against which new sums of money may be borrowed under certain conditions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. open-end investment company open enrollment Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language