a world of

a world of (something)

A very large amount of something. I know the old house seems run down, but a thorough cleaning and a fresh coat of paint will make a world of difference. If you're feeling sad, getting out in the sunlight should do you a world of good.
See also: of, world
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

a (or the) world of

a very great deal of.
See also: of, world
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
The mystical tux throws him into a world of espionage and danger.