/ Dictionary / Index P parallel cousin marriage: Meaning and Definition of Find definitions for: par'allel cous'in mar"riage Pronunciation: [key] marriage between the children of two brothers or two sisters. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. parallel cousin parallelepiped Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language