for the ages adjective 1adverb 1 adjective1 •Especially memorable and noteworthy; deserving to endure for a very long time.The comparison may seem unfair to Churchill now that he is a man for the ages by reason of his glorious bravado when the world, including Hitler, knew that his heart was heavy with dread. — 1953 adverb1 •In a manner that produces long-lasting effects; for posterity; for a very long duration.Little did Mr. Quiney think, when he wrote that letter, that he was writing for the ages. — 1916