+A **greatest element** is a unique member within a [partially ordered set](/wiki/partially_ordered_set) that is greater than or equal to every other element. If such an element exists, it is also the set's unique [maximum element](/wiki/maximum_element) and an upper bound for all its members.
+## See also
+- [Least Element](/wiki/least_element)
+- [Maximum Element](/wiki/maximum_element)
+- [Upper Bound](/wiki/upper_bound)
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