Learner's definition of ALIENATE
to make (someone) unfriendly
to cause (someone) to stop being friendly, helpful, etc., towards you
to cause (someone) to feel that she or he no longer belongs in a particular group, society, etc.
— + from
[more alienated; most alienated]
Her position on this issue has caused the alienation of many former supporters.
His alienation from his parents stems from his drug problems.
She has struggled with feelings of loneliness and alienation for much of her adult life.