/ Dictionary / Index P primary quality: Meaning and Definition of Find definitions for: pri'mary qual'ity Pronunciation: [key] — Epistemology. Epistemology. any of the qualities inherent in an object, namely quantity, extent, figure, solidity, and motion or rest. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. primary producer primary rainbow Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language