Poset

Posets are relations which are


 * Reflexive
 * Transitive
 * Antisymmetric

It means they can be chained together in a Hasse diagram

What is partial order
Partial order means the fact that you can move in multiple directions to get to the end. If it was completely ordered then it would be something like 1, 2, 3, 4, 5, 6, where there is a single order everything is present in