/ Dictionary / Index A assay ton: Meaning and Definition of Find definitions for: as'say ton' Pronunciation: [key] a unit of weight used in assaying ore, equivalent to 29.167 grams. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. assay office assbackwards Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language