Matrimonial/ˌmætrɪˈməʊniəl/ Definition 1 of 3Pro Tip 1/2Ceremonial Use Often used to describe formal events or rituals associated with getting married. The matrimonial celebration was held at a grand ballroom. Pro Tip 2/2Cultural Variance Matrimonial customs can vary widely across different cultures and religions. Their matrimonial traditions included a three-day celebration.