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Meaning of high-riser

high-ris•er

Pronunciation: (hī'rī"zur), [key]
— n.
  1. 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.
  2. a high-rise bicycle.
  3. high-rise (def. 4).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.