/ Dictionary / Index A aseity: Meaning and Definition of Find definitions for: a•se•i•ty Pronunciation: (u-sē'i-tē, ā-sē'-), [key] — n. Metaphys. existence originating from and having no source other than itself. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aseismic asemia Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language