1. A long comfortable upholstered seat with a back and normally with raised ends: After teaching school the whole day, Mrs. Smith loved to lie down on her sofa in the living room and rest before eating dinner.
2. Obsolete, a flor of a building that is partly raised and covered with a rug: In her book, Sally viewed a picture of an outdated sofa that was in a large room with a beautiful carpet, and which was typical in the Middle East.