How do you describe a casual relationship?

Casual dating is a type of relationship between people who go on dates and spend time together in an ongoing way without the expectation of entering into a long-term, committed relationship.

What is the difference between casual dating and a dating relationship?

One of the main differences between a serious, committed relationship and “causal dating” is that individuals in a committed relationship tend to be monogamous. In other words, you do not “date” other people. In a “casual dating” relationship, you are not required to be monogamous.