A solitudinarian is a person who likes to be alone most of the time and doesn't like being with other people.
Being a solitudinarian can make people think of someone who is quiet, thoughtful, and independent.
Examples:
My grandpa is a solitudinarian. He likes to be alone.
She is a solitudinarian and doesn't like big parties.
The solitudinarian prefers to spend time by himself.
The solitudinarian doesn't like noisy places.
The solitudinarian could live on a desert island and be happy.
The solitudinarian enjoys reading books alone in his room.