The spelling of the word "cloonan" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The word is pronounced /ˈkluːnən/ and has two syllables. The first syllable is pronounced with a long "oo" sound and the second syllable with a short "a" sound. The "c" is pronounced as "k" and the double "o" is pronounced as "oo". The "n" at the end is pronounced with a schwa sound, which is similar to a short "uh" sound.
I apologize, but "cloonan" does not appear to have a standard dictionary definition as it seems to be a proper noun without a widely recognized meaning in the English language. It is possible that "cloonan" could be a surname, a unique name for a person or a place, or it could be a term or phrase specific to a particular context or niche. Without further context or information, it is difficult to provide an accurate definition.
If you have any additional details or can specify the context in which "cloonan" is used, I'd be happy to assist you further in understanding the term.