vbl. sb. [f. STOPPER v. + -ING1.] The action of STOPPER v.
1805. in Polwheles Trad. & Recoll. (1826), II. 577. In ten minutes our rigging was past all stoppering.
1859. F. A. Griffiths, Artill. Man. (1862), 107. (4) The proper stoppering of the fall, when necessary.
attrib. 1877. Encycl. Brit., VI. 402/2. Many substitutes have been proposed for cork as a stoppering agent.