definition of fracking
Definition of FRACKING. : the injection of fluid into shale beds at high pressure in order to free up petroleum resources (such as oil or natural gas). â frack \Ëfrak\ verb.ADVERTISEMENT. by shortening & alteration from (hydraulic) fracturing. the injection of fluid into shale beds at high pressure in order to free up petroleum resources (such as oil or natural gas). â frack \Ëfrak\ verb.