Raft/ræft/ Definition 1 of 3Pro Tip 1/3Emergency Usage Often used to refer to an impromptu, makeshift floating device in survival situations. After the boat sank, they used their cooler as a raft. Pro Tip 2/3Recreational Activity Refers to activities on rivers or lakes, usually for fun or sport. They rented a raft at the lake for a leisurely paddle. Pro Tip 3/3Simple Construction Emphasizes the basic, often primitive construction compared to a boat. They built a simple raft from logs to cross the stream.