What is the meaning of the word "wash"?

Definitions:

admit to testing or proof verb
- This silly excuse won't wash in traffic court
any enterprise in which losses and gains cancel out noun
- at the end of the year the accounting department showed that it was a wash
be capable of being washed verb
- Does this material wash?
form by erosion verb
- The river washed a ravine into the mountainside
move by or as if by water verb
- The swollen river washed away the footbridge
remove by the application of water, other liquid, soap or other cleaning agent verb
- I washed the dirt from my coat.
the erosive process of washing away soil or gravel by water, as from a roadway noun
- I watched the wash remove mud from our driveway.
to cleanse (itself or another animal) by licking verb
- The cat washes several times a day