Is modern the opposite of ancient

Yes, modern and ancient function as temporal opposites, contrasting recent or contemporary periods with civilizations and eras from the distant past. Ancient typically refers to periods before the Middle Ages, particularly classical civilizations like Greece, Rome, Egypt, or Mesopotamia. Modern, depending on context, refers either to the current era or to the period following the Middle Ages (roughly post-1500 CE). Historians use "modern" more specifically to denote the Modern Era beginning around the Renaissance or Enlightenment.

The ancient-modern opposition works particularly well for historical discussions, archaeological contexts, or when comparing civilizations separated by millennia. However, precision matters: between ancient and modern lies the medieval or middle period, so something can be neither ancient nor modern. In everyday usage, "old" or "antiquated" might better oppose "modern" when describing objects or practices rather than historical periods. The ancient-modern contrast emphasizes maximum temporal distance and fundamental differences in technology, culture, and worldview rather than just the passage of time.