Jain/dʒeɪn/ Definition 1 of 2Pro Tip 1/3Religious Identity Used to identify someone who practices the Jain religion and its teachings. My new friend at school is a Jain; she goes to the temple every week. Pro Tip 2/3Dietary Habits Jains often follow strict dietary laws, including vegetarianism or veganism. They don't eat at fast-food chains because they're Jains. Pro Tip 3/3Cultural Specificity The term is specific to Indian culture and may not be well-known globally. In our global diversity class, we learned about Jains and their festivals.