1. a. A fundamental social group in society typically consisting of one or two parents and their children.
b. Two or more people who share goals and values, have long-term commitments to one another, and reside usually in the same dwelling place.
2. All the members of a household under one roof.
3. A group of persons sharing common ancestry.
4. Lineage, especially distinguished lineage.
When I think family I think of this:
And of this. It may not look like my family to you, it may look too big, or maybe you think the people in it are from too many different places (there are people from different countries - all on different continents at that - in this picture). But they are my family. I feel like they are my family, and when I'm gone for a long time I miss them like my family (most of the time).