1.) free of animal ingredients and/or materials
2.) morally consistent
1.) one who opposes unnecessary suffering and acts accordingly
Contraction of "vegetarian", from late middle English "vegetable", from late Latin "vegetabilis" meaning "animating", from Latin "vegetare" meaning "to quicken or bring to life"
"If you want to convince a vegan that you're a fool, ask he or she where they get their protein."
"No, milk is not vegan."
"Because farms are some of the worst polluters in the world, you cannot call yourself an environmentalist if you are not vegan."