noun

• The act or process of absorbing or of being absorbed as,
• (obsolete) engulfing; swallowing up, as of bodies or land.
• assimilation; incorporation.
• (chemistry, physics) the imbibing or reception by molecular or chemical action, of radiant energy; the process of being neutrons being absorbed by the nucleus; interception.
• (meteorology) The process in which incident radiant energy is retained by a substance (such as an air mass) by conversion to some other form of energy (such as heat).
• (physiology) in living organisms, the process by which the materials of growth and nutrition are absorbed and conveyed to the tissues and organs; taking in by various means, such as by osmosis.
• Entire engrossment or occupation of the mind.
• Mental assimilation.
• (electrical engineering) The retaining of electrical energy for a short time after it has been introduced to the dielectric.