Overview
An orphan (from the ) is a child whose parents have died.
In common usage, only a child who has lost both parents due to death is called an orphan. When referring to animals, only the mother's condition is usually relevant (i.e. if the female parent has gone, the offspring is an orphan, regardless of the father's condition).
Definitions
Various groups use different definitions to identify orphans. One legal definition used in the United States is a minor bereft through "death or disappearance of, abandonment or desertion by, or separation or loss from, both parents".
From Wikipedia (CC BY-SA 4.0).