The word "mesalliance" is a noun that refers to a marriage or union between a person of higher social status and a person of lower social status. This term is often used in a negative way, suggesting that the marriage is seen as inappropriate or not suitable because of the difference in social standing.
In literature or discussions about social norms, "mesalliance" can be used to critique societal expectations regarding marriage and class.
While "mesalliance" primarily refers to marriage, it can also be used metaphorically to describe any type of partnership or association that is considered socially inappropriate.
There are no direct idioms or phrasal verbs that use "mesalliance," but you might encounter phrases like "marrying down" to describe a similar concept in a more colloquial way.
"Mesalliance" is a specific term used to describe a marriage between individuals of significantly different social classes, often viewed negatively.