To have a disagreement or argument that results in a breakdown of a relationship. They used to be close friends, but they fell out over a business deal.
To drop from a place or position. The book fell out of the bag as she hurried down the street.
To happen as a result or consequence. We will have to wait and see what falls out from the new policy changes.
To lose hair or teeth naturally. His hair began to fall out due to stress.