Raft Raft, n. [Originally, a rafter, spar, and fr. Icel. raptr a rafter; akin to Dan. raft, Prov. G. raff a rafter, spar; cf. OHG. r[=a]fo, r[=a]vo, a beam, rafter, Icel. r[=a]f roof. Cf. Rafter, n.] 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. [U.S.] 3. [Perhaps akin to raff a heap.] A large collection of people or things taken indiscriminately. [Slang, U. S.] ``A whole raft of folks.'' --W. D. Howells. Raft bridge. (a) A bridge whose points of support are rafts. (b) A bridge that consists of floating timbers fastened together. Raft duck. [The name alludes to its swimming in dense flocks.] (Zo["o]l.) (a) The bluebill, or greater scaup duck; -- called also flock duck. See Scaup. (b) The redhead. Raft port (Naut.), a large, square port in a vessel's side for loading or unloading timber or other bulky articles; a timber or lumber port.