/ Dictionary / Index A atwain: Meaning and Definition of Find definitions for: a•twain Pronunciation: (u-twān'), [key] — adv. Archaic. in twain; in two; apart. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. at. vol. Atwater Related Content Daily Word Quiz: alacrity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language