(general) The act or process of absorbing or assimilating.
(biology) The process of absorbing or assimilating substances into cells or across the tissues and organs through diffusion or osmosis, as in absorption of nutrients by the digestive system, or absorption of drugs into the bloodstream.
(psychology) Complete attention, engrossment or concentration to an object or activity.
Word origin: Latin absorptio, from absorbere.
Related forms: absorb (verb).