1 ford, cross, traverse, walk, make one's way:
The water is only knee-deep, and you can wade across.
2 paddle, play, splash:
There is a shallow pool where the little children can wade.
3 wade in or into.
(a) enter, get in (or into), join (in):
When the fight began, Patrick waded in with arms flailing.
(b) attack, approach, get or set to work, plunge or dive into:
I have to wade into an enormous pile of mail that accumulated while I was away.
4 wade through. plough through, work (one's) way through, hammer or pound away at, plod through, peg away at:
You really have to wade through that entire book to write your report.