WordNet (r) 3.0 (2006):
one-on-one adv 1: (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] adj 1: directly between two individuals; "one-on-one instruction" 2: 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]