In Jainism, diksha means initiatory acceptance of monkhood or nunhood. It is the sacred step in which a person renounces worldly life, family attachments, possessions, and comforts, and dedicates life fully to spiritual discipline, ahimsa, self-control, and liberation.

In simple words:

• For householders: leaving worldly life
• For monks/nuns: entering the ascetic path
• Purpose: to progress toward moksha through renunciation and spiritual practice

Diksha is a very important and serious vow in Jain Dharma.