"Cousins by marriage" refers to the relationship between a person and the cousins of their spouse. This means that when two people marry, they not only become relatives to each other but also to each other's extended families. For example, if Alice marries Bob, Alice becomes a cousin by marriage to Bob's cousins. This relationship does not create a blood connection, but it can still foster familial bonds. Cousins by marriage may participate in family gatherings and events, strengthening ties between families. Understanding this relationship can help clarify family dynamics and connections in blended families.