the balance of advantage; superiority in strength, power, or resources:
the chances of something happening or being the case.
at odds in conflict or at variance.
it makes no odds informal, chiefly Brit. it does not matter. [from an earlier use of odds in the sense 'difference in advantage or effect'.]
lay (or give) odds offer a bet with odds favourable to the other better.
over the odds Brit. (especially of a price) above what is generally considered acceptable.
take odds offer a bet with odds unfavourable to the other better.