gum (Noun) — A preparation (usually made of sweetened chicle) for chewing.
gum (Noun) — The tissue (covered by mucous membrane) of the jaws that surrounds the bases of the teeth.
gum (Noun) — Any of various substances (soluble in water) that exude from certain plants; they are gelatinous when moist but harden on drying.
gum (Noun) — Cement consisting of a sticky substance that is used as an adhesive.
gum (Noun) — Wood or lumber from any of various gum trees especially the sweet gum.
gum (Noun) — Any of various trees of the genera Eucalyptus, Liquidambar or Nyssa that are sources of gum.
gum (Verb) — Cover, fill, fix or smear with or as if with gum. ex. "if you gum the tape it is stronger"
gum (Verb) — Grind with the gums; chew without teeth and with great difficulty. ex. "the old man had no teeth left and gummed his food"
gum (Verb) — Become sticky.
gum (Verb) — Exude or form gum. ex. "these trees gum in the spring"