1.
in a person's own house, flat / apartment, etc. :
I phoned you last night, but you weren't at home.
Oh no, I left my purse at home.
He lived at home (= with his parents) until he was thirty.
2.
comfortable and relaxed :
Sit down and make yourself at home .
Simon feels very at home on a horse.
3.
(used especially in journalism ) in sb's own country, not in a foreign country :
The president is not as popular at home as he is abroad.
4.
if a sports team plays at home , it plays in the town, etc. that it comes from :
Leeds are playing at home this weekend.
Is the match on Saturday at home or away?