night is the period of darkness in each twenty-four hours; the time from sunset to sunrise.
Other meanings of night include:
1. The evening or night-time as a distinctive part of the day
2. A specified or appointed night
3. The darkness of night
4. A period of misery, gloom, or adversity
5. In expressions like "good night" or "night night" as a farewell
night 最基本的意思就是黑夜，从太阳落山到第二天太阳升起这段时间，懂吧？
不过这个词儿可有意思了，还有好多别的用法：
1. 特指晚上这段时间，比如说"Let's go out tonight"就是"咱今晚出去嗨"
2. 指定某个晚上，比如"the night of the party"就是"派对那天晚上"
3. 形容黑夜的黑暗，像"the night was pitch black"就是"黑得伸手不见五指"
4. 比喻困难时期，比如"the long night of suffering"就是"漫长的苦难岁月"
5. 道别用语，"good night"就是"晚安"，"night night"是更亲昵的说法，跟小孩儿说"睡香香"差不多
文化小贴士：老外说"burn the midnight oil"可不是烧油，是熬夜加班的意思；"night owl"也不是猫头鹰，是夜猫子！