An example of gum is to put a stamp on an envelope; to gum the stamp.
An example of gum is for a branch to get sticky from residue that flows out of a wound or slit in the tree; to gum up.
An example of gum is for a baby to chew up soft baby food; to gum their food.
An example of gum is a sticky ooze from a tree.
An example of gum is Trident.
An example of the gum is the area of the mouth that becomes sore if you have to have a tooth pulled.
Do you have a gum to spare?
That cheap oil will gum up the engine valves.
The new editor can gum up your article with too many commas.