/ Dictionary / Index S spinproof: Meaning and Definition of Find definitions for: spin•proof Pronunciation: (spin'prf"), [key] — adj. (of an airplane) designed so as to be highly resistant to a tailspin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Spinozism spin quantum number Related Content Daily Word Quiz: crockery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language