Conditional probability in lottery games refers to the probability of an event occurring given that another event has already occurred. In lotteries, this concept is often applied to understand the likelihood of certain outcomes based on prior knowledge. For example, if certain numbers have already been drawn, the conditional probability would calculate the likelihood of a specific set of numbers being drawn next, given the previous results. However, in most lotteries, each draw is independent, so the probability of a number being drawn remains the same regardless of past outcomes.