/ Dictionary / Index P pampas grass: Meaning and Definition of Find definitions for: pam'pas grass" Pronunciation: [key] a tall, ornamental grass, Cortaderia selloana, native to South America, having large, thick, feathery, silvery-white panicles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pampas Pampeluna Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language