\Po*lyg"ra*phy\, n. [Gr. ?; poly`s much + gra`fein to
write: cf. F. polygraphie.]
1. Much writing; writing of many books. [Obs.] --Fuller.
2. The art of writing in various ciphers, and of deciphering
   the same. [R.]
3. The art or practice of using a polygraph.