in action
1
(of a person) doing something one is trained for or is very good at
The idiom "in action" originated in the military, specifically during World War I, when soldiers were sent to the front lines to fight. It was used to describe soldiers who were actively engaged in combat and carrying out their training. It is often used to describe situations where someone is performing a task or activity that they are trained for or skilled at.
- Despite being exhausted from the long hours, the medical team stayed in action and worked tirelessly to save the lives of those injured in the accident.
- The chef is in action in the kitchen, preparing dishes for the busy dinner rush.
2
(of a thing) serving its purpose or operating in a way that it is designed or programmed
The idiom "in action" originated in the military, specifically during World War II, when it was used to describe military equipment that was being used in combat. It is often used to describe situations where a thing or device is functioning as expected or performing its intended purpose.
- The new engine was in action during the race and provided the driver with the power they needed to win.
- The new software system proved to be reliable and efficient, as it remained in action without any issues during a busy week of data processing.