Definition:Disjoint Sets

Definition
Two sets $S$ and $T$ are disjoint iff:
 * $S \cap T = \varnothing$

That is disjoint sets are such that their intersection is the empty set &mdash; they have no elements in common.

Also known as
Some early sources refer to such sets as non-overlapping.

The term mutually exclusive sets can also be seen.

Also see

 * Definition:Pairwise Disjoint