1. Lain (past participle of lie): This is the most common meaning of "lain". It means to have been in a horizontal or resting position, typically lying down. For example:
* "The book has lain on the table all day."
* "She had lain awake all night worrying."
2. Lain (a surname): "Lain" can also be a surname, though it is not particularly common.
3. Lain (a given name): While not a common name, "Lain" can be used as a given name, particularly in some cultures.
4. Lain (as part of a phrase): "Lain" can also appear in certain phrases, such as "to lie in wait" or "to lie low".
5. Lain (a Japanese anime series): "Lain" is also the name of a popular Japanese anime series, which explores themes of virtual reality, identity, and the nature of reality itself.
Therefore, to understand the meaning of "lain", you need to consider the context in which it is used.