1. billionfold - Adjective
2. billionfold - Adverb
billionfold (not comparable)
A billion times so
a billionfold dilution
a billionfold increase
billionfold (not comparable)
In a billionfold way; by a billion degrees; on a scale of a billion
multiply something a billionfold
magnify something a billionfold
it is a billionfold heavier than something else