What does yrre mean in old English?

"Yrre" is not a word in Old English. It might be a misspelling or a word from another language.

Could you please provide more context or clarify the word you are looking for?

For example:

* Where did you encounter this word?

* What is the surrounding text?

* Are you sure it's Old English?

With more information, I can help you find the correct meaning.