* Verb (past participle): This is the most common usage. Example: "He turned red with embarrassment."
* Adjective: This is less common, but possible. Example: "The turned pages of the book were dog-eared."
* Noun: This is even less common, but still possible. Example: "He took a turned on the road." (This usage is somewhat archaic and dialectal.)
To determine the specific part of speech, you need to look at the context of the sentence.