Used to limit the length of a game. It is the time allotted to reach a certain number of moves. Most GM games are 40 moves in 2 hours, in which case a player forfeits the game if they have not played 40 moves in the first two hours.
TIME CONTROL
Meaning of TIME CONTROL in English
English glossary of chess terms. Английский глоссарий шахматных терминов. 2012