1. A hair; hence, the fiber of wool, cotton, and the like; also, the nap when thick or heavy, as of carpeting and velvet.
  2. A covering of hair or fur.
  3. The head of an arrow or spear.
  4. A large stake, or piece of timber, pointed and driven into the earth, as at the bottom of a river, or in a harbor where the ground is soft, for the support of a building, a pier, or other superstructure, or to form a cofferdam, etc.
  5. One of the ordinaries or subordinaries having the form of a wedge, usually placed palewise, with the broadest end uppermost.
  6. A mass of things heaped together; a heap; as, a pile of stones; a pile of wood.
  7. A mass formed in layers; as, a pile of shot.
  8. A funeral pile; a pyre.
  9. A large building, or mass of buildings.
  10. Same as Fagot, n., 2.
  11. A vertical series of alternate disks of two dissimilar metals, as copper and zinc, laid up with disks of cloth or paper moistened with acid water between them, for producing a current of electricity; -- commonly called Volta's pile, voltaic pile, or galvanic pile.
  12. The reverse of a coin. See Reverse.

v. t.

  1. To drive piles into; to fill with piles; to strengthen with piles.
  2. To lay or throw into a pile or heap; to heap up; to collect into a mass; to accumulate; to amass; -- often with up; as, to pile up wood.
  3. To cover with heaps; or in great abundance; to fill or overfill; to load.