The word overaged generally means something that is too old, past its prime or outdated. Opposite to the word overaged, the antonyms include several words like youthful, fresh, modern, contemporary, new, up-to-date, current, and young. Youthful refers to something that is lively, energetic, and full of vitality. Fresh suggests something that is recently made, has not been used, or is in original condition. Modern and contemporary are used to refer to something that is current and relevant to the present times. New and up-to-date refer to something that has recently been made or updated. Finally, young refers to something that is at the beginning of its development, growth, or career.