billionfold

Adjective

 * 1) A billion times so
 * a billionfold dilution
 * a billionfold increase

Adverb

 * 1) 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

Usage notes
Both the adjective and the adverb are often used as hyperbole, indicating not literally a billion, but rather some vague inestimable large number or amount.