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English definition of “theoretical”

theoretical

adjective     /θɪəˈretɪkəl/
based on ideas or theories, rather than practical uses of something or actual events: theoretical economics/physics theoretical models/analyses/approaches a theoretical framework/foundation/underpinning
existing only as an idea, rather than being real or actually happening: The threat of climate change is no longer merely theoretical.
(Definition of theoretical adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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