The terms "primary" (or "primary relationship") and "secondary" (or "secondary relationship") are commonly used to briefly convey rough distinctions among relationships in a person's life. Most often the terms are used to generally describe the type or "category" of a relationship, regarding involvement, commitment, or priority; thus it is not uncommon to discuss having multiple primary relationships, or having only secondary relationships with no primary. The exact distinctions between these categories of relationship vary depending on the speaker, but "primary" usually refers to a "marriage-like" relationship in terms of living arrangements, finances, commitment or child-rearing (legal marriage or domestic partnership may or may not be involved); while "secondary" usually implies less of these aspects, and "tertiary" (which is much less used) would be still less involved or more casual.