- 1[uncountable] the act of assimilating someone or something, or being assimilated the rapid assimilation of new ideas his assimilation into the community
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- 2[uncountable, countable] (phonetics) the act of making two sounds in speech that are next to each other more similar to each other in certain ways, for example the pronunciation of the/t/ in football as a/p/; an example of this process
Check pronunciation: assimilation