25 CFR §11.1200

For purposes of this subpart: Domestic violence means to inflict physical harm, bodily injury, or sexual assault, or the fear of imminent physical harm, bodily injury, or sexual assault on a family member. Family member means any of the following: Parent means persons who have a child in common, regardless of whether they have been married or have lived together at any time.

(1) A spouse;

(2) A former spouse;

(3) A person related by blood;

(4) A person related by existing or prior marriage;

(5) A person who resides or resided with the defendant;

(6) A person with whom the defendant has a child in common; or

(7) A person with whom the defendant is or was in a dating or intimate relationship.