wander/ramble//meander

what’s the difference between wander/ramble and meander and what does meander mean at all?[/b]
thanx in advance

Meander suggests leisurely wandering over an irregular or winding course.
that’s what in the dictionary but what does an irregular or winding course mean then?

To walk aimlessly. To walk without any clear direction.
One hasn’t started to go to a particular place.
Any bird in the tree or a flower in the field is able to change his route.

thanks a lot

wander means to walk slowly in aplace
ramble meansto walk for pleasure