This is the 296th most frequent Swedish word.
familjen
"The family."
Here, 'familjen' is used as a definite singular form to denote 'the family', a specific group of people living together.
Familjen bor i ett rött hus på landet.
The family lives in a red house in the countryside.
In this sentence, 'familjen' also refers to 'the family' but in the context of meeting all its members.
Jag träffade hela familjen igår.
I met the whole family yesterday.
Here, 'familjen' refers to 'the family' specifically focusing on their collective decision-making as a unit.