/wun"way"/ , adj.
1. moving, or allowing movement in one direction only: a one-way street.
2. valid for travel in one direction only: a one-way ticket. Cf. round trip .
3. without a reciprocal feeling, responsibility, relationship, etc.: It's a one-way friendship.
4. not intended for return to a seller, dealer, etc., for reuse; disposable: one-way bottles.
[ 1815-25 ]