Definition of one-to-one
1
:pairing each element of a set uniquely with an element of another set
2
:one-on-one 2
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First Known Use of one-to-one
1873
ONE-TO-ONE Defined for English Language Learners
one-to-one
play
adjective
Definition of one-to-one for English Language Learners
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: involving two people who are dealing with each other directly
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: perfectly matching one thing in a group to another thing in another group
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