/ Dictionary / Index S Silly Putty: Meaning and Definition of Find definitions for: Sil'ly Put"ty Pronunciation: [key] — Trademark. Trademark. a brand of children's claylike modeling substance that can be shaped, stretched, rolled into a ball and bounced, etc. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. silly billy silly season Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language