noun
a person who prefers not to associate with others; someone who is often alone
adjective
describing someone who tends to be alone or prefers solitude
-
The introverted scientist preferred to work alone, as he was known to be a loner.
-
Sarah always eats lunch by herself in the corner, she's a bit of a loner.
-
Don't worry about him, he's just a loner who likes to keep to himself.
-
The old tree stood tall and solitary in the field, like a loner in a crowded room.