查询结果:

n. 假期,休假[=(英)holiday(s)]

拆分: -vac-空 + -ation名词词尾 → 空闲的状态

短语: 
on vacation 在度假 
vacation at, vacation in [美]在...度假 

例:
The children wait impatiently for the vacation. 孩子们焦急地等待着假期的来临。 
He took a vacation in the south of France. 他在法国南部度假。 
People come here on vacation. 人们到这里来度假。