| 1. | A kind of mattress made of, or covered with, waterproof fabric and filled with water, thus providing uniform support to the body lying on it; - also a bed constructed so as to contain such a mattress. It is used in hospitals for bedridden patients, as well as in some private homes. |
| Noun | 1. | water bed - a bed with a mattress made of strong plastic that is filled with water |
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