* Is a misspelling: Perhaps you meant a similar-sounding word like "singly" or "slightly."
* Is a regional dialect word: It might be a term used in a specific geographical location or community.
* Is a made-up word: It could be a fictional term from a book, movie, or game.
To help me understand what you meant, please provide more context:
* Where did you encounter this word?
* What was the sentence it was used in?
With more information, I can help you determine the meaning of "sigley."