Meanings
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1
verb
rare: to make a continuous buzzing, humming, or droning sound
Bees bombinate among the flowering vines on warm afternoons.
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2
verb
rare and figurative: to speak at length in a loud, monotonous, or empty way
The pompous lecturer continued to bombinate long after his argument had run out.
Thesaurus
Etymology
From Medieval Latin bombinare, 'to buzz or hum,' a variant related to Latin bombilare and Greek bombos, 'booming or humming.' The sound-imitating base also encouraged the figurative sense of droning or pompous speech.