AN 9.84-91 Hindrances, Etc.

The active practice of 'bringing into being' wholesome states. It is the deliberate nurturing of the bright state of mind.

An abiding with a steady, collected awareness that is attained through seclusion from the five hindrances and unwholesome mental states. When supported by right view, a jhāna can be a basis for the wearing away of taints and directing the mind toward the vision of Nibbāna.

Active presence of mind and lucid retention; the faculty that remembers the Dhamma, anchors attention to the chosen object or present experience, and guards the mind against unwholesome states.