In poker, “complete” typically refers to a specific action in a stud game. When a player has already placed the bring-in bet and another player wants to call that bet, they have the option to “complete” the bet by betting the lower limit of the game. This is also known as completing the bet to the full bet amount.
For example, in a $10/$20 seven-card stud game, the player with the lowest door card is required to post a bring-in bet of $5. If another player wants to call that bet and “complete” it, they would bet an additional $10 to reach the full bet amount of $10 for the remaining rounds of betting.