I've been treated like a 'second-class citizen'. [=someone who is not given the same rights as other people]
She was a United States 'citizen' but lived most of her life abroad.
programs/activities for 'senior citizens'
(..) Now the man responsible for it is dead. Let the dead bury the dead this time, Mr Finch. I never heard tell it was against the law for any citizen... to do his utmost to prevent a crime from being committed... which is exactly what he did. Maybe you'll tell me it's my duty (..)1962 To Kill a Mockingbird