Probably the definition of what unilaterism is, which definitively ended to declare a democratic un decision unilateral.

One interesting point is that the democratic eu are considered at will and depending on the circumstances as a country/nation to call for an unilateral decision (whereas decisions or stances taken by the democratic eu are the result of obscure bargaining and negociating or as a set of divided countries when for example talking about multiculturalism to say that the democratic us are more multicultural than the democratic eu.