/ Dictionary / Index U USECC: Meaning and Definition of Find definitions for: USECC Pronunciation: [key] United States Employees' Compensation Commission. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. useable used Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language