Having complete or unlimited knowledge; knowing everything. Often used to describe a literary narrator who knows all characters' thoughts and actions, or theoretically applied to divine beings.
From Latin 'omnisciens,' combining 'omnis' (all) and 'sciens' (knowing), from 'scire' (to know). The word literally means 'all-knowing' and was originally used in theological contexts before expanding to literature and general usage.
Think 'omni-' (all) + 'science' (knowledge) = knowing all the science, all the facts, everything! Like a narrator who knows every character's secret thoughts and future actions.
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