What is the meaning of Quadruplicate?

having four parts

four times over, multiplied by four

in quadruplicate: four times over, in four copies

To replicate four times; to make fourfold; to quadruple.

inflection of quadruplicare:

1. second-person plural present indicative
2. second-person plural imperative

second-person plural present indicative

second-person plural imperative

feminine plural of quadruplicato

second-person plural present active imperative of quadruplicō

Source: wiktionary.org