/ Dictionary / Index O object lesson: Meaning and Definition of Find definitions for: ob'ject les"son Pronunciation: [key] a practical or concrete illustration of a principle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. objectless objet d'art* 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