Noun
-
a quantity that is four times as great as another
-
a set of four similar things considered as a unit
Verb
-
increase fourfold
"His stock earning quadrupled"
Adjective
-
four times as great or many
"a fourfold increase in the dosage"
- four fold -
having four units or components
"quadruple rhythm has four beats per measure"
"quadruplex wire"
- four fold