Definition of assimilation
1a : an act, process, or instance of assimilating The clash of lifestyles has made assimilation difficult.
b : the state of being assimilated
3 phonetics : change of a sound in speech so that it becomes identical with or similar to a neighboring sound the usual assimilation of \z\ to \sh\ in the phrase his shoe
4 : the process of receiving new facts or of responding to new situations in conformity with what is already available to consciousness
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