/ Dictionary / Index W whereinto: Meaning and Definition of Find definitions for: where•in•to Pronunciation: (hwâr-in't, wâr--hwâr&secin-t', wâr&sec-), [key] — conj. into which. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. wherein where'll Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language