odds

A certain number of points given beforehand to a weaker side in a contest to equalize the chances of all participants.

The ratio of the probability of an event’s occurring to the probability of its not occurring.

The likelihood of the occurrence of one thing rather than the occurrence of another thing, as in a contest.

A ratio expressing the amount by which the stake of one bettor differs from that of an opposing bettor.

An amount or degree by which one thing exceeds or falls short of another.

(at odds) In disagreement; in conflict.

(by all odds) In every possible way; unquestionably.

Inequality; difference, especially in favor of one and against another; excess in favor of one as compared with another.

Hence Advantage; superiority.