noun
Refers to a physical building where people live, or one's own home.
彼は大きな家に住んでいる。
He lives in a big house.
家に帰りたい。
I want to go home.
noun
Refers to the family unit or household members, not the building.
家で相談してから決めます。
I'll decide after discussing it with my family.
彼は家の大黒柱だ。
He is the breadwinner of the household.
noun
Refers to one's ancestry, family line, or the family name as a social unit. Often used in formal or historical contexts.
彼は由緒ある家の出だ。
He comes from a family of distinguished lineage.
家を継ぐのは長男の役目だ。
It is the eldest son's duty to succeed the family name.