'one-on-one' definitions:

adverb

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

adjective

Directly between two individuals; "one-on-one instruction"

adjective

Being a system of play in which an individual defensive player guards an individual offensive player; "one-on-one defense" [syn: one-on-one, man-to-man]