One-to-one (adjective)

Relating to or denoting a situation or relationship in which two things are directly and exclusively connected, paired, or matched.

Origin:

The term 'one-to-one' is derived from the mathematical concept of a function that maps one unique input to one unique output.

Examples:

1. The one-to-one correspondence between the elements of the two sets was established.
2. The one-to-one coaching sessions helped the athlete to improve their performance.
3. The one-to-one mentorship program provided the young professional with valuable guidance.
4. The one-to-one relationship between the teacher and the student was built on mutual trust.
5. The one-to-one approach to customer service helped the company to retain its clients.