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."