poset
nounUK /ˈpəʊsɛt/
US /ˈpoʊsɛt/
A poset is a set of things where some pairs are ordered, like smaller and bigger.
In this poset, every number is less than or equal to the numbers above it.
OTHER MEANINGS
2. In mathematics, a set equipped with a reflexive, antisymmetric, and transitive binary relation.
The divisibility relation makes the positive integers a poset.
3. A diagram or structure showing which elements come before others in a partial order.
The poset diagram shows that a is below b but not comparable to c.
4. Any collection of items ranked by a rule that does not compare every pair.
Tasks in a project can form a poset when some must be done before others but others are independent.