* A misspelling: Perhaps you meant a similar word like "crate" or "craft."
* A slang term: It's possible "crat" is a slang word used in a specific context or region. Could you provide more context or information about where you encountered this word?
* A technical term: It might be a technical term in a specific field. Knowing the context could help decipher its meaning.
Please give me more information about where you saw "crat" and any other context you can provide, and I can help you figure out its meaning.