Eggs are generally considered non-vegetarian because they are an animal product (produced by hens), but they are functionally vegetarian for Ovo-vegetarians since commercially sold eggs are unfertilized and do not develop into chicks. While culturally classified as non-veg in India, they are often accepted as vegetarian elsewhere, making it a matter of personal, cultural, or religious belief. 
Key Considerations
    • Scientific Perspective: Unfertilized eggs (standard store-bought) do not contain animal flesh and cannot hatch, leading many to view them as an animal byproduct, similar to milk.
    • Cultural & Religious Perspective:
       In India and many traditional contexts, eggs are categorized as non-vegetarian because they come from an animal.
  • Ethical Perspective: Some vegetarians avoid eggs due to the industrial farming practices, while others consume them.
  • Dietary Classifications:
    • Lacto-vegetarians: Avoid eggs and meat.
    • Ovo-vegetarians: Eat eggs but avoid dairy and meat.
    • Lacto-ovo-vegetarians: Consume both eggs and dairy. 
Ultimately, if you strictly avoid foods derived from animals, eggs are considered non-vegetarian. If your focus is solely on avoiding animal slaughter, many consider eggs vegetarian.