Both may be correct, so the tie-breaker is local usage and avoidance of confusion. One-to-one is used in math while one a good third often in sports. Similarly, both are used in the same setting. So a meeting might be either. If you talk about a one-to-one meeting, the listener may think you are referring to the hour.

Both may be correct, so the tie-breaker is local usage and avoidance of confusion. One-to-one is used in math while one a good third often in sports. Similarly, both are used in the same setting. So a meeting might be either. If you talk about a one-to-one meeting, the listener may think you are referring to the hour.

Both may be correct, so the tie-breaker is local usage and avoidance of confusion. One-to-one is used in math while one a good third often in sports. Similarly, both are used in the same setting. So a meeting might be either. If you talk about a one-to-one meeting, the listener may think you are referring to the hour.

Both may be correct, so the tie-breaker is local usage and avoidance of confusion. One-to-one is used in math while one a good third often in sports. Similarly, both are used in the same setting. So a meeting might be either. If you talk about a one-to-one meeting, the listener may think you are referring to the hour.

Both may be correct, so the tie-breaker is local usage and avoidance of confusion. One-to-one is used in math while one a good third often in sports. Similarly, both are used in the same setting. So a meeting might be either. If you talk about a one-to-one meeting, the listener may think you are referring to the hour.

Both may be correct, so the tie-breaker is local usage and avoidance of confusion. One-to-one is used in math while one a good third often in sports. Similarly, both are used in the same setting. So a meeting might be either. If you talk about a one-to-one meeting, the listener may think you are referring to the hour.