Veganism according to the vegan society:
https://www.vegansociety.com/go-vegan/definition-veganism
> "Veganism is a philosophy and way of living which seeks to exclude—as far as is possible and practicable—all forms of exploitation of, and cruelty to, animals for food, clothing or any other purpose; ...
Most importantly to the point, animal agriculture causes more suffering because we still need to farm grains for feed, more than we would have to otherwise. Reducing animal agriculture will have a positive impact on wildlife, reducing deforestation, etc.