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English definition of “one-on-one”

one-on-one

adjective [before noun]     /ˌwʌn.ɒnˈwʌn/ US  /-ɑːn-/ (UK also one-to-one)
A one-on-one activity involves two people talking directly, usually with one teaching or giving information to the other: Each employee has a one-on-one performance review with his or her boss.Communicating and keeping in touch
(Definition of one-on-one adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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