Atichaar (अतिचार) in Jainism means excessive or extreme conduct—going beyond what is proper, modest, or necessary in spiritual practice and daily behavior. It often refers to actions or attitudes done out of vanity, ostentation, pride, or strictness that goes beyond the Dharma’s rightful boundaries. In Jain ethics, atichaar is something to be avoided, and one should aim for balanced, appropriate conduct (yatharthāchār) that supports non-violence, truth, and self-restraint.

Key points:

• It denotes going overboard in behavior or outward show.
• It contrasts with proper conduct (samyak charitra) and the core Jain ideals of ahimsa, aparigraha, and self-discipline.
• Different Jain traditions (Digambar and Shwetambar) agree on the general idea, though wording or emphasis may vary in certain teachings.

If you’d like, I can provide a simple example from Jain texts or a brief stotra/sutra that mentions avoiding atichaar.