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Jhāna is the Pali word for meditation and can be translated as 'meditative absorption'. It is a particular form of meditative stabilization, where the quality of concentration deepens to the point of allowing for a sense of peace, joy, or other naturally arising states to manifest. The quality of 'jhānic' experience involves having a clarity and vividness of perception, where phenomena can be seen in vivid detail, without any sense of effort or strain. By stabilizing and deepening into meditative practice, the vipassana or insight practices can be undertaken more effectively.

See also: insight meditation, dependent origination, samadhi practice, metta practice

PS - Playing in the In-Betweens - (Practising the Jhānas) 5 mentions

Going Forwards - (Practising the Jhānas) 4 mentions

Q & A (3) - (Practising the Jhānas) 4 mentions

Jhanas and Insight - (Practising the Jhānas) 4 mentions

Talk Four: Jhanas One to Four - (The Art of Concentration (Samatha Meditation)) 4 mentions

Q & A (4) - (Practising the Jhānas) 3 mentions

What is Awakening? (Part 1) - (The Mirrored Gates) 3 mentions

Q & A (2) - (Practising the Jhānas) 3 mentions

The Nature of Enchantment - (Re-enchanting the Cosmos: The Poetry of Perception) 3 mentions

Body and Soul (Q & A) - (Tending the Holy Fire) 2 mentions