/ Dictionary / Index C compression molding: Meaning and Definition of Find definitions for: compres'sion mold"ing Pronunciation: [key] a method of molding thermosetting plastic by closing a mold on it, forming the material by heat and pressure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. compression ignition compression ratio Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language