Definition of One-on-one

1. Adverb. (of two persons) in direct encounter. "Interviewed her person-to-person"

Exact synonyms: Person-to-person

2. Adjective. Directly between two individuals. "One-on-one instruction"
Similar to: Private

3. Adjective. Being a system of play in which an individual defensive player guards an individual offensive player. "One-on-one defense"
Exact synonyms: Man-to-man
Category relationships: Athletics, Sport
Similar to: Individual, Single

Definition of One-on-one

1. Adjective. (chiefly North America) Involving direct communication between two people. ¹

2. Adjective. (sports) involving one attacker and one defender ¹

3. Adjective. (mathematics) bijective or injective ¹

4. Noun. A contest involving only one player on each side, especially of an activity often involving teams. ¹

¹ Source: wiktionary.com

Lexicographical Neighbors of One-on-one

one-man band
one-man rule
one-member
one-millionth
one-minute warning
one-night stands
one-nighter
one-nighters
one-ninth
one-note
one-of-a-kind
one-of-a-kinds
one-off
one-offs
one-on-one (current term)
one-party
one-percent milk
one-percenter
one-percenters
one-person(a)
one-piece
one-quadrillionth
one-quintillionth
one-seventh
one-shot
one-shots
one-sided
one-sidedly
one-sidedness

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