* A misspelling: Perhaps you meant a different word, like "Edison" (famous inventor), "edition" (a version of a book), or "ELISA" (a laboratory test).
* A foreign word: It might be a word in another language. If you provide the language, I might be able to help you understand it.
* A proper noun: It could be a name, a place, or a company.
Please provide more context to help me understand what you mean by "edisa."