to be independent in mind and action; to follow one's own path without conforming to social norms or the behavior of others

chivalrous hero or swordsman who acts alone

To walk alone; to be solitary and friendless.

to decide and act alone based on one's own will without considering the opinions of others; to be a law unto oneself

(idiom) to go one's own way; to act independently or do what one thinks is right regardless of others' opinions

(law) A legal act established by the expression of intent of a single party (such as a will or the waiving of a right)

To act according to one's own beliefs regardless of others; to follow one's own path.

to decide and act alone without consulting others or listening to advice; (variant form)

to ignore other people's opinions and make decisions or take actions entirely on one's own