Why " by the wind" ? Why not "by wind"?

[NewHopeR]

I think that the "the" here is both redundant and inaccurate.

Context:

[h=5]dune[/h]n.
a ridge of sand created by the wind; found in deserts or near lakes and oceans

 

[bhaisahab]

I think that the "the" here is both redundant and inaccurate.

Context:

dune

n.
a ridge of sand created by the wind; found in deserts or near lakes and oceans

It's correct with "the".