/ Dictionary / Index F Fifth Commandment: Meaning and Definition of Find definitions for: Fifth' Command'ment Pronunciation: [key] “Honor thy father and thy mother, that thy days may be long upon the land which the Lord thy God giveth thee”: fifth of the Ten Commandments. Cf. Ten Commandments. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fifth column fifth dimension Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language