From Longman Dictionary of Contemporary Englishbe/feel at homebe/feel at homea) USED TO/ACCUSTOMED TOto feel comfortable in a place or with a personbe/feel at home in/with I’m already feeling at home in the new apartment. After a while we began to feel at home with each other. b) USED TO/ACCUSTOMED TOto feel happy or confident about doing or using somethingbe/feel at home with/in Practise using the camera until you feel quite at home with it. → home
Examples from the Corpusbe/feel at home• Would she ever feel at home in this relentless, pitiless city?• But it is here, at this Hillcrest hospital, where he feels at home.• This immediate social environment is merely that in which he feels at home.• With the politics of action too, I feel at home.• The g was less, and that made me feel at home.• As it was with Kip, Martinez seemed to be at home with himself.• Edwin was the only one in the family who felt at home in Los Angeles and remained there.