One-to-one is used when you talk about transfer or communications. You may use one-to-one when you can identify a source & a destination. For eg., a one-to-one gmail is one sent from a single person to another, i.e., no ccs or bccs. In maths, a one-to-one mapping maps one element of a phối to lớn a quality element in a target phối.

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One-on-one is the correct adjective in your example. See Free dictionary. One-on-one is used when there are two people involved in mutual exchange, as happens in a meeting.

The difference is rather usage-based, but most important: Do not forget the hyphens.


This might be confusing because of the similar phrases such as "man-to-man" và "heart-to-heart", which refer khổng lồ an interaction, vs one-to-one, which refers to a transaction (or in the database world, a relationship).

Meanwhile "One-on-One" has a sort of domination/subordination sound to it, where one is on top of the other.

At the end of the day, when two people are having a private conversation or face off or meeting, it"s a one-on-one.


One-to-one is less combative sầu, & implies a communication between two people.

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One-on-one implies an interaction between two people, và can carry more of a combative subtext, like a one-on-one karate fight.


Either may be correct, so the tie-breaker is local usage và avoidance of confusion. In my circle, one-to-one connotes a mathematical relationship while one-on-one is used more often in athletic contests. So a meeting might be either. But if you talk about a meeting as one-to-one, the listener may think you are referring khổng lồ the hour.

Face-to-face can also imply there are more than two participants. One-on-one has been used in business meetings for years; và, yes--there is often a "dominance" factor. One is a "leader" or "manager" and one is a subordinate.It"s not necessarily pretty, but that"s business for you.

Adding point to lớn accepted answer. one-on-one / person-to-person meeting:1) One person listens khổng lồ other to know his ideas, suggestions, feedbachồng. One person tries khổng lồ underst& the other persons" expectations, problems và suggestions. One of purposes of this one-on-one meeting would be, each person would like to lớn improve the unique of delivery/contribution lớn the organization/purpose/business.

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