debunk UK /diːˈbʌŋk/US /dɪˈbʌŋk/noun 1verb 1forms 3 noun1 •(informal) A debunking; the act by which something is debunked. verb1 •To discredit, or expose to ridicule the falsehood or the exaggerated claims of something; to refute.The explosion story was thoroughly debunked on National Public Radio in November 1999. formsdebunked · debunking · debunks