Definition of "Gum" :
noun: the tissue (covered by mucous membrane) of the jaws that surrounds the bases of the teeth
noun: a preparation (usually made of sweetened chicle) for chewing
noun: any of various trees of the genera Eucalyptus or Liquidambar or Nyssa that are sources of gum
noun: wood or lumber from any of various gum trees especially the sweet gum
noun: cement consisting of a sticky substance that is used as an adhesive
noun: any of various substances (soluble in water) that exude from certain plants; they are gelatinous when moist but harden on drying
verb: exude or form gum
"These trees gum in the Spring."
verb: become sticky
verb: grind with the gums; chew without teeth and with great difficulty
verb: cover, fill, fix or smear with or as if with gum
"If you gum the tape it is stronger."