If there is no common elements in sets then that sets are called **disjoint sets**. in other word

If A and B are two sets such that A ∩ B = φ, then A and B are called **disjoint sets**

**For example**, let A = { 2, 4, 6, 8 } and B = { 1, 3, 5, 7 }. Then A and B are disjoint sets, because there are no elements which are common to A and B

**Venn diagram of disjoint sets**