1. 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.
2. A collection of logs, fallen trees, etc. (such as is formed in some western rivers of the united states), which obstructs navigation.
3. akin to raff a heap A large collection of people or things taken indiscriminately. A whole raft of folks. Raft bridge. A bridge whose points of support are rafts. A bridge that consists of floating timbers fastened together. Raft duck. The name alludes to its swimming in dense flocks.
(Science: zoology) A large, square port in a vessel’s side for loading or unloading timber or other bulky articles; a timber or lumber port.
Origin: Originally, a rafter, spar, and fr. Icel. Raptr a rafter; akin to Dan. Raft, Prov. G. Raff a rafter, spar; cf. OHG. Rafo, ravo, a beam, rafter, Icel. Raf roof. Cf. Rafter.