gum2 past tense and past participle gummed, present participle gumming [transitive always + adverb/preposition]
British English old-fashioned
to stick things together using glue [= glue]
gum something to something
A large label had been gummed to the back of the photograph.
gum something ↔ upphrasal verb
Dirt had got inside the watch and gummed up the works.