/ Dictionary / Index F Fourth Commandment: Meaning and Definition of Find definitions for: Fourth' Command'ment Pronunciation: [key] “Remember the sabbath day, to keep it holy”: fourth of the Ten Commandments. Cf. Ten Commandments. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fourth class fourth dimension Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language