How do you spell Gullies

Available Definitions:
1)  n. - A large knife.
2)  n. - A channel or hollow worn in the earth by a current of water; a short deep portion of a torrent's bed when dry.
3)  n. - A grooved iron rail or tram plate.
4)  v. t. - To wear into a gully or into gullies.
5)  v. i. - To flow noisily.