I have looked it up, but I failed to get a correct answer. Maybe, you could help me out.
It would depend on the sentence and the context, Panicmonger. Fuddy-duddy has a connotation of being old-fashioned and not up-to-date or savvy to the latest fashion or technology. Other possibilities:
elder - positive senior citizen - positive to neutral codger - an often mildly eccentric and usually elderly fellow the old man - phrase for someone's husband, boyfriend, father, or boss; to some people, it's not respectful; to some, it doesn't have a negative connotation
So, please give us a sentence with some more of an idea of what you're trying to communicate. Thanks!
The term older people is being used nowadays as a form that is meant to be more polite than old or elderly, or so I was told when I attended a lecture on the subject of ageing societies a couple of years ago.