/ Dictionary / Index H high-riser: Meaning and Definition of Find definitions for: high-ris•er Pronunciation: (hī'rī"zur), [key] — n. a couch or single bed with a mattress and frame concealed beneath, which, when pulled all the way out, lift up to the level of the upper cushion or mattress and lock into place to form a double bed. a high-rise bicycle. high-rise (def. 4). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: high-riser (Thesaurus) high-rise highroad Related Content Daily Word Quiz: voracious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language