Ambiamory is defined as the ability to enjoy both monoamory and polyamory with little to no preference between the two. This is not a type of relationship, but rather a specific feeling one may have towards relationships. An ambiamorous individual may have only one partner, or they may have multiple. In the case of having multiple partners, consent from all individuals involved is required. Everyone has to be aware that their partner has other partners, and they also have to express that they are okay with it, otherwise it's simply cheating.
This can apply to romantic, sexual, queerplatonic relationships, or any other type of relationship. Ambiamory can be used as prefix for other forms of attraction. For example, in the case of queerplatonic attraction, "ambiamorous" may be switched with "ambiqueerplatonic." In the case of alterous attraction, the term "ambiamorous" may be switched with "ambialterous." However, these forms for attraction can be grouped into ambiamory; alternative terms simply exist for those who don't feel the "-amorous" prefix properly fits their relationship types.
Ambiamorous was coined sometime before May 11th, 2016, by a polyamorous friend of Tumblr user The Moorcat to describe their fluid relationship style. It was independently coined again on April 17th, 2017, by Poly Land writer Page Turner. The term was proposed in response to controversy that monogamy and polyamory were two ends of a spectrum that did not interact.
The primary ambiamorous flag was coined by mod AP of Tumblr blog beyond-mogai-pride-flags on April 14th, 2019. The colors come from a redesign of the polyamorous flag, with white alluding monogamy. The flag uses the Greek letter alpha because both start with "a", resembling the monogamous and polyamorous designs.
The second flag was coined by an unknown. The third ambiamorous flag was coined by Tumblr user sleepygender on March 9th, 2020, and holds no confirmed meaning.
Ambi comes from the prefix ambo, which means "both" in Latin.