/ Dictionary / Index A A.C.S.C.,: Meaning and Definition of Find definitions for: A.C.S.C. Pronunciation: [key] Association of Casualty and Surety Companies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. A.C.S. A/cs pay. 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