clunk /klʌŋk/noun 3verb 1forms 3 noun3 •A dull, metallic sound, especially one made by two bodies coming into contact. •(offensive) dull; foolish; stupid or silly person. •(old-fashioned) The sound of liquid coming out of a bottle, etc.; a glucking sound. verb1 •To make such a sound.Her old bicycle was clunking along the road. formsclunked · clunking · clunks