/ Dictionary / Index P partially ordered set: Meaning and Definition of Find definitions for: par'tially or'dered set' Pronunciation: [key] — Math. Math. a set in which a relation as “less than or equal to” holds for some pairs of elements of the set, but not for all. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. partialize partial ordering 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