The British spelling of actualization; the process of making something real or actual, or fulfilling potential.
From 'actualise' (British spelling) plus '-tion' suffix. Comes from Latin 'actualis' (relating to acts or deeds). The '-ise' ending is standard British English, while American English uses '-ize'.
The British 'actualisation' versus American 'actualization' is more than just spelling—it reflects deeper differences in how English evolved after 1776, with British English conserving older Romance-influenced patterns.
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