/ Dictionary / Index A aby: Meaning and Definition of Find definitions for: a•by Pronunciation: (u-bī'), [key] — v., a•bought. —v.t. to pay the penalty of. —v.i. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aby (Thesaurus) Abwehr Abydos Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language