The word "last" can refer to several meanings depending on the context. Generally, it can mean the final item in a sequence or the most recent occurrence. For example, if you say "the last chapter of a book," it indicates the final chapter. Additionally, "last" can mean to endure or continue over time, such as in "the meeting will last two hours."
The word "last" comes from the Old English "lǣst," which means "the final part." It is also related to the Proto-Germanic "*laistaz," which carries a comparable meaning.