transformation
US /ˌtræns.fɚˈmeɪ.ʃən/
UK /ˌtræns.fɚˈmeɪ.ʃən/

1.
a dramatic change in form or appearance
:
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The city has undergone a complete transformation in the last decade.
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Her new hairstyle was a total transformation.
2.
the process of changing or being changed completely
:
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The caterpillar's transformation into a butterfly is fascinating.
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Digital transformation is crucial for modern businesses.