A fire deliberately set or controlled for burning off vegetation, or historically, a beacon fire used for signaling or warning.
From 'burn' (Old English 'biernan') + 'fire' (Old English 'fyr'). The compound appears in historical agricultural and military contexts dating back to medieval English.
Before electricity, burnfire signals were essential—armies and coastal communities used controlled fires on hilltops to relay messages across great distances faster than any messenger could ride!
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