- Difference in favor of one and against another; excess of one
of two things or numbers over the other; inequality; advantage;
superiority; hence, excess of chances; probability. - Quarrel; dispute; debate; strife; -- chiefly in the phrase at
odds.
Meaning of 'odds' (Princeton's WordNet)
1 . odds
[ n]
Meaning (1): - the ratio by which one better's wager is greater than that of another