/ Dictionary / Index O Old Stoa: Meaning and Definition of Find definitions for: Old' Sto'a Pronunciation: (stō'u), [key] the earliest phase of Stoicism, lasting from the latter part of the 4th century to the early part of the 3rd century b.c. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oldster Old Stone Age Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language