Definition of "Absorption" :

noun: the mental state of being preoccupied by something

noun: complete attention; intense mental effort

noun: (chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid

noun: (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium

"The absorption of photons by atoms or molecules."

noun: the process of absorbing nutrients into the body after digestion

noun: the social process of absorbing one cultural group into harmony with another