Noun
a sofa that can be converted into a bed
Source: WordNetsofa-bed
Pick up a thick, furry rug to provide cushioning for top-heavy toddlers, throw in a cheap sofa bed for comfort and/or sleepovers, and line the walls with low-lying storage units for easy reach. Source: Internet
The wood-clad interiors feature two double beds and a sofa bed, a kitchenette and a shower room. Source: Internet