/ Dictionary / Index P partial ordering: Meaning and Definition of Find definitions for: par'tial or'dering Pronunciation: [key] — Math. Math. a relation defined on a set, having the properties that each element is in relation to itself, the relation is transitive, and if two elements are in relation to each other, the two elements are equal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. partially ordered set partial pressure Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language