one-on-one

adjectives

directly between two individuals
"one-on-one instruction"
is similar to
confined to particular persons or groups or providing privacy
"a private place"; "private discussions"; "private lessons"; "a private club"; "a private secretary"; "private property"; "the former President is now a private citizen"; "public figures struggle to maintain a private life"
being a system of play in which an individual defensive player guards an individual offensive player
"one-on-one defense"

adverbs

(of two persons) in direct encounter
"preferred to settle the matter one-on-one"; "interviewed her person-to-person"