What does Over and Under mean in sports betting?

Over/Under betting is trying to predict if the combined score of both teams playing will either be OVER or UNDER the number set by the odds makers.

For example, if a game had odds of 55.5 OVER -110, betting $100.00 on the over would be a winning bet if the combined score of the two teams was 56 points or higher. The bettor would receive their $100.00 wager back, plus winnings of $90.91.

If the same game had odds of 55.5 UNDER +105, betting $100.00 on the under would be a winning bet if the combined score of the two teams was 55 points or less, and the bettor would receive the original $100.00 wager back, plus winnings of $105.00.