adj incidental; relating to, but not essential.
2. circumstantial ·adj consisting in, or pertaining to, circumstances or particular incidents.
3. circumstantial ·adj abounding with circumstances; detailing or exhibiting all the circumstances; minute; particular.
4. circumstantial ·noun something incidental to the main subject, but of less importance; opposed to an essential;
generally in the plural; as, the circumstantials of religion.