/ Dictionary / Index E esterase: Meaning and Definition of Find definitions for: es•ter•ase Pronunciation: (es'tu-rās", -rāz"), [key] — n. Biochem. any enzyme that hydrolyzes an ester into an alcohol and an acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ester ester gum Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language