someone or something that terminates (= ends) something

The article described Yeltsin as a terminator of the Soviet system. 文章将叶利钦描述为苏联体制的终结者。

Certain words and characters are interpreted as commands, separators, or command terminators. 某些单词和字符被解释为命令、分隔符或命令终止符。

the line that separates the dark part of the moon or a planet from the part that is lit up

As the moon rises, the terminator will fall across the crater, and the floor of the crater will be in shadow. 随着月亮升起，明暗分界线将会跨越陨石坑，陨石坑的底部将处于阴影之中。