/wun"on wun", -awn-/ , adj.
1. consisting of or involving direct individual competition, confrontation, or communication; person-to-person: a one-on-one discussion.
adv.
2. in direct encounter: I'd rather settle this with her one-on-one.
3. go one-on-one with , Sports. to play directly against (an opposing player).
n.
4. a meeting or confrontation between two persons.
[ 1965-70, Amer. ]