vegangelical adjective 1noun 1forms 3 adjective1 •(informal) Inclined to preach about the benefits of a vegan diet.Many vegan activists recommend that we be vegangelical with our loved ones and friends, taking every opportunity to point out why their flesh food is hurting their health[…] — 2009 noun1 •(informal) A person inclined to preach about the benefits of a vegan diet. formsvegangelicals · more vegangelical · most vegangelical