/ Dictionary / Index W Weierstrass: Meaning and Definition of Find definitions for: Wei•er•strass Pronunciation: (vī'ur-sträs", -shträs" Ger. vī'ur-shträs"), [key] 1815–97, German mathematician. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Weidman Weierstrass approximation theorem Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language