(n): the process in which one substance takes up or holds another (by either absorption or adsorption)
(n): (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium
(n): a process existing in or produced by nature (rather than by the intent of human beings)
(n): the social process of absorbing one cultural group into harmony with another
(n): a process involved in the formation of groups of persons
(n): the process of absorbing nutrients into the body after digestion
(n): a process occurring in living organisms
(n): complete attention; intense mental effort
(n): the faculty or power of mental concentration
(n): the mental state of being preoccupied by something
(n): the state of a person's cognitive processes
