semaphore
🇺🇸
/ˈseməfɔːr/
🇬🇧
/ˈseməfɔː(r)/
A way to communicate using hand or flag signals to represent letters or messages.
Before radio, ships used semaphore to communicate with each other across the sea.
在無線電出現之前,船隻使用信號旗在海上相互通信。
To communicate using semaphore or a similar signal system.
The soldiers semaphored their position to the commander.
士兵們用信號旗向指揮官發出了他們的位置。