loner
n. countable B2 Upper Intermediate US //ˈɫoʊnɝ// UK //lˈəʊnɐ// lon·er
n. someone who prefers to be alone rather than spend time with other people. You use this for a person who does not have many friends or does not want them.
n. a person who avoids or does not seek out the company of others. Often carries a neutral or slightly negative connotation depending on whether the isolation is perceived as a choice or a social failure.
He was always a bit of a loner at school.
While his colleagues went out for drinks every Friday, Mark, a natural loner, preferred to head home and read.
The protagonist is portrayed as a stoic loner whose self-imposed isolation serves as a defense mechanism against the emotional demands of his community.
From lone + -er.
Usage
Often used with the verb 'to be' and the indefinite article 'a'.