Something that impedes, stands in the way of, or holds up progress, either physically or figuratively
The ratio of the probability of an event happening to that of it not happening.
I'd say the odds are strongly in favor of the sun rising tomorrow morning.
An advantage given to a weaker opponent in order to equalize the game when playing casually, usually by removing one of the stronger player's pieces or by giving the weaker player more time.
The ratio of winnings to stake in betting situations.