Definitions

1. noun

A binary relation on a set that is reflexive and transitive, but may not be antisymmetric.

“The set with the quasiorder relation is a partially ordered set.”

2. noun

A relation that is reflexive and transitive, but may not be antisymmetric, used in the study of partially ordered sets.

“The quasiorder relation is used to study the properties of partially ordered sets.”