noun, formal - a person who is officially held in custody, typically due to suspicion of illegal activity, or for political or security reasons
noun - a person who has been elected to represent people in a parliament, especially in countries like the UK, Canada, or India
noun, British English, informal - a young person, often from a lower social class who uses rude language, and behaves in a loud or aggressive way
noun - a person or organization that puts money into financial schemes, property, or a business with the expectation of achieving a profit