Laya means "absorption" or "dissolution" (of the mind).

union with the supreme consciousness through pranayama or devotion. Literally, union by absorption

Yoga stage where breathing stops

("Yoga of dissolution"): an advanced form or process of Tantric yoga by which the energies associated with the various psycho-energetic centers (cakra) of the subtle body are gradually dissolved through the ascent of the serpent power (kundalini-shakti)

Laya Yoga – shaivic system of practicing Yoga based on chakras development and inducing Kundalini energy. Laya means absorbing and dissolving or melting all difficulties and negatives, liberating from obstacles and problems by dissolving karman and destroying ovules of causes. It is usually called yoga of absorption or absorbing the lower nature by higher divine spiritual forces.