Breadcrumb Home > Dictionary > Index S second childhood: Meaning and Definition of Find definitions for: sec'ond child'hood Pronunciation: [key] senility; dotage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Second Chamber second class ✖ Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language