adj. /twelv"fohld'/ ; adv. /twelv"fohld"/ , adj.
1. having twelve sections, aspects, divisions, kinds, etc.
2. being twelve times more, larger, greater, etc., as a given quantity size, intensity, or the like.
adv.
3. twelve times in amount or degree: Its potential destructive power was increased twelvefold.
[ 1550-60; OE twelf-feald. See TWELVE, -FOLD ]