What’s the definition of a family for travel insurance?

The definition of a family for travel insurance is:

• You and your wife, husband, civil partner or partner who lives with you in a relationship for at least six months at the same address as you, regardless of gender
  
  
• Your unmarried dependent children (including adopted, fostered and step-children) under the age of 18 years (or under the age of 21 if in full-time education), living in the same household, including children living away from home in full-time education.