/ Dictionary / Index U unstpd.: Meaning and Definition of Find definitions for: unstpd. Pronunciation: [key] unstamped. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. unstow unstrained 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