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English definition of “one-way”

one-way

adjective uk   /ˌwʌnˈweɪ/ us  
[before noun] travelling or allowing travel in only one direction: I drove the wrong way down a one-way street. How much is a one-way ticket to New York?Routes and roads in general a one-way ticket to sth If something is a one-way ticket to an unpleasant situation, it will cause that situation to happen: A rejection of the peace deal would be a one-way ticket to disaster for the country.Causing things to happen describes a relationship that is not fair because only one person or group of the two makes any effortUnfairness and favouring someone unfairlyJustice and fairness
(Definition of one-way from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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