beacon
noun [ C ] uk/ˈbiː.kən/ us/ˈbiː.kən/
（山顶上作为信号的）信标灯；灯塔；烽火
a light or fire on the top of a hill that acts as a warning or signal
As part of the centenary celebrations a chain of beacons was lit across the region. 作为百年庆典的一部分，这个地区各处点起了一盏盏信标灯。
figurative She was a beacon of hope in troubled times. 在动荡的年代，她是人们的希望之灯。