Collectively exhaustive

From Freepedia

In probability theory, a set of events is collectively exhaustive if at least one of the events must occur. For example, when rolling a six-sided die, the outcomes 1, 2, 3, 4, 5, and 6 are collectively exhaustive, because they encompass the entire range of possible outcomes.

Compare this to the concept of a set of outcomes which are mutually exclusive, which means that at most one of the events must occur. The set of all possible die rolls is both collectively exhaustive and mutually exclusive.