What is the meaning of the word "rail"?

Definitions:

convey (goods etc.) by rails verb
- fresh fruit are railed from Italy to Belgium
enclose with rails verb
- rail in the old graves
fish with a handline over the rails of a boat verb
- They are railing for fresh fish
lay with rails verb
- hundreds of miles were railed out here
provide with rails verb
- The yard was railed
separate with a railing verb
- rail off the crowds from the Presidential palace
short for railway noun
- We traveled by rail.
travel by rail or train verb
- They railed from Rome to Venice