The Definition of Family!

fam·i·ly
n. pl. fam·i·lies

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.

5. A locally independent organized crime unit, as of the Cosa Nostra.

6. a. A group of like things; a class.

b. A group of individuals derived from a common stock: the family of human beings.

7. Biology A taxonomic category of related organisms ranking below an order and above a genus. A family usually consists of several genera.

8. Linguistics A group of languages descended from the same parent language, such as the Indo-European language family.

9. Mathematics A set of functions or surfaces that can be generated by varying the parameters of a general equation.

10. Chemistry A group of elements with similar chemical properties.

11. Chemistry A vertical column in the periodic table of elements.

http://www.thefreedictionary.com/family