English Expression · Intermediate
signal box
The alarm-box of a police or fire alarm system
Pronunciation: say signal box
Meaning
A building or cabin beside a railway track containing the levers or equipment for operating signals and points.
Example
The signal box operator pulled the lever to change the tracks for the approaching train.
The signal box operator pulled the lever to change the tracks for the approaching train.
Practice tips
- Practice signal box out loud — read the pronunciation guide above and repeat.
- Use it in your own sentence today; reuse beats rereading.
- Pay attention to context: this English expression is for intermediate-level learners.