ˌone-ˈway BrE AmE adjective [usually before noun]
1 . a one-way street is one in which vehicles are only allowed to travel in one direction:
the town’s one-way system
2 . especially American English a one-way ticket is for travelling from one place to another but not back again OPP round-trip SYN single British English
3 . a one-way process, relationship etc is one in which only one person makes any effort or provides anything