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A building for human habitation
The family lives in a big house.
They bought a new house last year.
A household or family
The whole house was excited about the party.
Use 'house' with verbs like 'buy', 'sell', 'rent', 'live in'.
'House' is a countable noun.
Old English 'hūs', related to German 'Haus', Dutch 'huis'.
Commonly used to refer to a building for human habitation, can also refer to a household or family.