a/the world of difference

a world of difference

1. A stark contrast. There's a world of difference between high school classes and college classes.2. A vast improvement. A fresh coat of paint has made a world of difference in that old house.See also: difference, of, world

a/the ˈworld of difference (between A and B)

(informal) a lot of difference (between A and B): There’s a world of difference between ‘speed’ and ‘haste’.See also: difference, of, world