In a redraw, a player who has already made a drawing hand, such as a flush or straight draw, receives a card that improves their chances of winning. However, the player is still concerned that their opponent might have a stronger hand. For instance, if a player has four cards to a flush and draws a fifth card of the same suit, they have completed their flush. But if their opponent has a full house, the flush, even though completed, will lose to that hand.
Redraw Example
For example, in a Texas Hold’em game, you have 9♠ 10♠, and the flop shows 5♠ 6♠ K♥. You have a flush draw with four spades. If the turn card is the 7♠, you have completed your flush. However, if your opponent has K♠ K♦, they have a set, which means they are currently winning. In this scenario, your flush is a redraw but may not be the winning hand.