"absorption" in the noun sense
1. absorption, soaking up
chemistry) a process in which one substance permeates another a fluid permeates or is dissolved by a liquid or solid
2. absorption
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"
3. assimilation, absorption
the social process of absorbing one cultural group into harmony with another
4. assimilation, absorption
the process of absorbing nutrients into the body after digestion
5. concentration, engrossment, absorption, immersion
complete attention intense mental effort
6. preoccupation, preoccupancy, absorption, engrossment
the mental state of being preoccupied by something
Source: WordNet® (An amazing lexical database of English)
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