“Bade sajan” by itself is not a standard term or sutra in Jain Dharma.

In normal Hindi:

• “Bade” = great / big / elder
• “Sajan” = beloved / dear one / husband / friend

So “bade sajan” just means “great beloved” or “very dear one” in a general, loving way. It is not a fixed Jain technical word like “Navkar Mantra”, “Pachkhan”, “Bhaktamar”, etc.

If you are referring to a specific Jain bhajan, aarti, or stavan that has “bade sajan” in its lyrics, please mention the full line or name of the bhajan in your next message so I can explain it accurately in a Jain context.