high-riser

American  

[hahy-rahy-zer] / ˈhaɪˌraɪ zər /

noun

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.

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