In Major League Baseball, a timeout is a halt of play. This action officially stops the ball. During a timeout, coaches usually talk to their players about upcoming plays or to rally their athletes in times of distress. For example, a timeout can be called if something is in the batter's eye like dust or an insect; to give the batter more time to prep to rival a pitcher; etc.
For the baseball teams, all of the active players, as well as some of the inactive yet present players, are called to the dugout by the coach to discuss strategies, tactics, or an overall morale boost.
The managers of the baseball teams must confirm the umpire-in-chief for the timeout to officially be terminated and for the game to resume normally.
If the timeout is related to a player receiving an injury, the timeout would most likely last as long as it took for a medic to assess the player on the field and escort them back to the locker room. Sometimes, a coach or manager will continue the delay of the game slightly to check out the player's conditions and rearrange the roster accordingly.
Occasionally, a weather delay can form during a timeout. For many Major League Baseball teams, they have a hand full of employees tasked with monitoring the weather during the game. They can advise the umpire about any potential weather threats that might cause further delay of the baseball game.
The umpire additionally takes in other weather-related factors if they affect visibility. If the umpire believes it is too dark to continue the game, the timeout may be extended to a weather delay or ultimately a weather check. The same can be said if the field lights go out and cannot provide adequate lighting for the players to safely continue the game.
Baseball teams are allowed as much time as they need after the umpire confirms the timeout. Some umpires decide to use the hand signal for a timeout, and this signal is both hands help up in the air. Other umpires use vocal calls while others decide to use both. The umpire's vocal call is, "Time!" and thus the ball is considered "dead." This means that the ball is not active and that the game is temporarily halted. So, the ball cannot be used to tag anyone, in a pinch, and any other plays.
Upon the end of the timeout, the umpire-in-chief announces, "Play!" The umpire-in-chief can also use a hand signal which is essentially the umpire bringing their hand back and forth in a beckoning motion towards their body. Upon the verbal call or signal, gameplay is to continue normally.
When both teams are finished with their use of the time out and game is ready to continue, the umpire-in-chief gives the call to begin again.