What part of speech is eight?

"Eight" can be a few different parts of speech depending on its context:

* Adjective: Describes a noun, indicating a quantity. Example: "There were eight kittens in the basket."

* Noun: Refers to the number itself. Example: "The number eight is my lucky number."

* Numeral: Represents a specific numerical value. Example: "I have eight apples."

The most common usage is as a numeral, but it can also function as an adjective or noun depending on the sentence structure.