/ Dictionary / Index S superplastic: Meaning and Definition of Find definitions for: su•per•plas•tic Pronunciation: (s"pur-plas'tik), [key] — adj. (of some metals and alloys) having the capacity to undergo extreme deformation at high temperatures. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. superphysical superport Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language