/ Dictionary / Index A ASTM: Meaning and Definition of Find definitions for: ASTM Pronunciation: [key] American Society for Testing Materials. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Asti spumante Astolat Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language