Pronunciation: (hī'rī"zur), [key]
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.