A person who compiles or writes dictionaries; a lexicographer.
From 'dictionary' (Latin dictionarium, from dictio 'a saying') + '-arian' (noun suffix meaning 'a person concerned with'). An older term for what we now call a lexicographer.
Historic dictionarians like Samuel Johnson literally created the English language's official meanings—they didn't just document words, they had the power to define what counted as 'real' English!
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