stopple /ˈstɒpəl/noun 2verb 1forms 3 noun2 •A plug; a stopper. •A projection or lid in a pollen grain that falls away to allow the passage of the pollen tube. verb1 •To plug; to stop up.Shut your mouth, dame, / Or with this paper shall I stopple it. — 1603 formsstoppled · stoppling · stopples