Technically, a vegetarian is a person who has made the conscious choice of not consuming meat. However, since the word "vegetarian" is very broad and loosely defined, there are numerous people who fall into other categories of vegetarianism.
0 - Omnivore
Consumes all animal products
1 - Semi-Vegetarian
Abstains from certain meats, such as red meat
2 - Pescetarian
Abstains from all meats, but will consume fish, mollusks and animal derivatives
3 - Lacto-Ovo Vegetarian
Abstains from all direct animal products (ie: meat or fish) but will consume milk and egg products
4 - Ovo Vegetarian
Abstains from all direct animal products (ie: meat or fish) but will consume egg products
5 - Lacto Vegetarian
Abstains from all direct animal products (ie: meat or fish) but will consume milk products
6 - Vegan
Abstains from all animal products and derivatives
