proppant in English dictionary proppant Meanings and definitions of "proppant" sand or similar particulate material suspended in water and used in hydraulic fracturing noun Sand or similar particulate material suspended in water or other fluid and used in hydraulic fracturing (fracking) to keep fissures open. more Grammar and declension of proppant proppant ( plural proppants) proppant (plural proppants) more Sample sentences with "proppant" Declension Stem Try again Available translations French German Irish Polish Russian Swedish Authors