1. plural of waterbed; beds consisting of a water-filled mattress, typically made of vinyl, enclosed in a frame

Examples

• The hotel room had two waterbeds instead of regular mattresses.
• Waterbeds were very popular in the 1970s and 1980s.
• Some people find waterbeds more comfortable for their back problems.
• The apartment came furnished with waterbeds in both bedrooms.
• Waterbeds require special heaters to maintain a comfortable temperature.
• Moving waterbeds can be difficult because they need to be drained first.