What is the meaning of rafts?

noun

• A flat float (usually made of logs or planks) that can be used for transport or as a platform for swimmers.
  • synonyms: raft
• Often followed by `of'. ( a large number or amount or extent)
  • usage: "a batch of letters"; "a deal of trouble"; "a lot of money"; "he made a mint on the stock market"; "see the rest of the winners in our huge passel of photos"; "it must have cost plenty"; "a slew of journalists"; "a wad of money"
  • synonyms: batch, deal, flock, good deal, great deal, hatful, heap, lot, mass, mess, mickle, mint, mountain, muckle, passel, peck, pile, plenty, pot, quite a little, raft, sight, slew, spate, stack, tidy sum, wad
• A large number or amount.
  • usage: "made lots of new friends"; "she amassed stacks of newspapers"
  • synonyms: tons, dozens, heaps, lots, piles, scores, stacks, loads, slews, wads, oodles, gobs, scads, lashings

verb

• Transport on a raft.
  • usage: "raft wood down a river"
  • synonyms: raft
• Travel by raft in water.
  • usage: "Raft the Colorado River"
  • synonyms: raft
• Make into a raft.
  • usage: "raft these logs"
  • synonyms: raft