Group Relationship

A Group Relationships refer to a polyamorous relationship in which several people form a single unit. All participants are in a relationship with all other participants of the group relationship. This relationship may be exclusive to those in the relationship (not an open relationship) and the people in the group may consider themselves married to each other.

Not all polyamorous relationships are group relationships. Some members of a polyamorous relationship may not consider themselves in a relationship with all other members. (For example A, B, and C are dating. D is dating B and C, but D is not in a relationship with A. In a group relationship all four would be in a relationship with each other.)

It is different from a pluriad, as pluriads may include flings (as flings do not count as dedicated relationships.)

History
It is unknown when the term was coined, however it has been around since January 15th of 2016.

Flag
The flag was coined by Deviantart user NonMonoPrideFlags on January 15th of 2016. It has no confirmed meaning.

Resources
https://www.deviantart.com/pride-flags/art/Group-Relationship-Pride-584663268