What is the meaning of At_home?

Used other than figuratively or idiomatically: see at, home. In one's place of residence.

At ease; comfortable.

In the home of one's parents.

Playing at its usual venue, playing as the home team.

Available or willing to receive visitors.

A type of reception or party whereby the host or hostess says that he or she will be ‘at home’ during specific hours, when guests can come and go as they like.

Source: wiktionary.org