conversion · noun C or U /kənˈvɜr.ʒən/Full view
C2 when the appearance, form, or purpose of something is changed
Dictionary examples:

the country's conversion to democracy

Solar power is the conversion of the sun's energy into heat and electricity.

Learner example:

This 'magic' conversion of energy can be performed in several ways, which result in different degrees of 'dignity' or 'cleanness' for the resulting electrons, freely running through our cables. (Certificate of Proficiency in English; C2; Italian)

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