integration
US /ˌɪn.t̬əˈɡreɪ.ʃən/
UK /ˌɪn.t̬əˈɡreɪ.ʃən/

1.
the act or process of combining two or more things to form a whole
:
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The integration of new technologies into the system improved efficiency.
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The company is working on the integration of its various departments.
2.
the act of bringing people of different racial or ethnic groups into equal membership in society or an organization
:
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The school promoted the integration of students from diverse backgrounds.
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Civil rights movements fought for the integration of public spaces.