Tapa in Jain Dharma means austerity or self-discipline done with a spiritual aim. It is voluntary restraint and penance to burn bad karma and purify the soul, helping a person rise toward spiritual clarity.

Key ideas:

• It involves controlling the senses, passions, and desires, not just physical hardship.
• Common forms include fasting, limiting activities, standing or staying in a simple body posture, refraining from injury or harm, and studying or meditating on Jain teachings.
• Tapa is practiced by both monks/nuns (ascetics) and lay followers, though the intensity and scope differ. For monks, tapas is extensive and rigorous; for laypeople, it is moderate but sincere.
• There are minor differences in how Digambara and Śvetāmbara traditions describe specific practices, but both see tapas as a path to purify karma and progress on the spiritual journey.

If you’d like, I can explain how tapas is described in specific Jain sutras or stutras and give simple examples suitable for a lay follower today.