NeoDict for iPhone.

Available free in the App Store

View
NeoDict for Android.

Available free in the Play Store

View
English Dictionary
▪ doublethink▪ doubleton▪ doubling▪ doubloon▪ doubly
◊ doubling
doubling
n 1: increase by a factor of two
2: raising the stakes in a card game by a factor of 2; "I
decided his double was a bluff" [syn: {double}]