To announce or state something officially and clearly.
From Old French declarer, derived from Latin declarare (de- meaning 'completely' and clarare meaning 'to make clear'). The root is related to clarum meaning 'clear' or 'bright.'
Declarative sentences in grammar are named after this word—they 'declare' or state facts as opposed to asking questions or giving commands. The whole category of how we make assertions in language comes from the power of declaration.
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