(Canada, US, Australia) A segment of roadway that directs vehicular traffic from a freeway onto local roads. / (by extension) An exit strategy.

unofficial / secret

unofficially / secretly, in secret

(chiefly Canada, US) Involving direct communication or competition between two people. / (sports) Involving one attacker and one defender. / (mathematics) bijective or injective

A contest involving only one player on each side, especially of an activity often involving teams.

(idiomatic) The practice of flipping a coin in the air, to choose between two alternatives based on which side lands face up.

Needing only a single attempt to become effective. / Unique; occurring only once. / Performing all the necessary steps on every occurrence, rather than relying on previous setup.

(television, film, comics) A television program, film, or comic book that is not part of a series. / (film) A cinematographic shot of a person talking to camera; a talking head.

(video games) To kill or destroy with a single hit.

(idiomatic) To lack support, as in an argument, debate, or negotiation.