Meanings
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1
adj
brilliantly clear, loud, and commanding, especially of a voice, sound, or appeal
Her clarion warning carried across the crowded square.
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2
noun
a medieval trumpet with a narrow tube and a high, clear tone, or a sound resembling it
The distant clarion sounded above the noise of the advancing troops.
Thesaurus
Etymology
From Middle English clarion and Old French clarion, from Medieval Latin clario ("trumpet"), based on Latin clarus ("clear, audible, or loud"). The adjective arose from attributive use of the instrument's name and its penetrating tone.