quadruplicate
1. [ verb ] reproduce fourfold
Examples:

"quadruplicate the bill"

Related terms: reproduce quadruple
2. [ adjective ] having four units or components
Synonyms: fourfold quadruple
Examples:

"quadruple rhythm has four beats per measure"

Related terms: multiple
3. [ adjective ] having four units or components
Synonyms: quadruple quadruplex fourfold
Examples:

"quadruple rhythm has four beats per measure" "quadruplex wire"

Related terms: multiple
4. [ noun ] any four copies; any of four things that correspond to one another exactly
Examples:

"it was signed in quadruplicate"

Related terms: copy quadruple
Similar spelling:   quadruplex
  quadruplet
  quadrupling
  quadruple_time
  quadrupedal
  quadriplegic