A collection of logs, boards, pieces of timber, or the like, fastened together, either for their own collective conveyance on the water, or to serve as a support in conveying other things; a float.
A collection of logs, fallen trees, etc. (such as is formed in some Western rivers of the United States), which obstructs navigation.
i) A lifeboat or small (often inflatable) boat, esp. for use in emergencies, ii) a floating accumulation of trees, ice, etc., iii) transport as or on a raft, cross (water) on a raft.