The spelling of the word "readee" may appear confusing at first glance, but it follows the rules of English phonetics. The word is pronounced as /rɛdiː/ with the stress on the first syllable. The double "e" at the end of the word indicates that it is a past participle, as in "I have readee the book." While uncommon, the spelling choice is valid and understandable within the phonetic system of the English language.
I apologize, but "readee" does not exist in the English language, and therefore, there is no available dictionary definition for this term. It is possible that you may be referring to a different word or a potential neologism. If you have any other specific words or terms that you would like a definition for, please feel free to ask, and I would be happy to assist you.