An attendant spirit, often in animal or demon form.
The witch’s familiar was a black cat.
A member of one's family or household.
A member of a pope's or bishop's household.
A close friend.
The officer of the Inquisition who arrested suspected people.
Known to one, or generally known; commonplace.
there’s a familiar face; that tune sounds familiar
Acquainted.
I'm quite familiar with this system; she's not familiar with manual gears
Intimate or friendly.
we are not on familiar terms; our neighbour is not familiar
Inappropriately intimate or friendly.
Don’t be familiar with me, boy!
Of or pertaining to a family; familial.