Double

n.
  1. Twice as much; twice the number, sum, quantity, length, value, and the like.
  2. Among compositors, a doublet (see Doublet, 2.); among pressmen, a sheet that is twice pulled, and blurred.
  3. That which is doubled over or together; a doubling; a plait; a fold.
  4. A turn or circuit in running to escape pursues; hence, a trick; a shift; an artifice.
  5. A person or thing that is the counterpart of another; a duplicate; copy; (Obs.) transcript; -- now chiefly used of persons. Hence, a wraith.
  6. A player or singer who prepares to take the part of another player in his absence; a substitute; -- used especially of a person who resembles an actor and takes the actor's place in scenes requiring special skills; as, a stunt double.
  7. Double beer; strong beer.
  8. (Eccl.) A feast in which the antiphon is doubled, hat is, said twice, before and after the Psalms, instead of only half being said, as in simple feasts.
  9. (Lawn Tennis) A game between two pairs of players; as, a first prize for doubles.
  10. (Mus.) An old term for a variation, as in Bach's Suites.