noun, verb, gummed, gum⋅ming.| 1. | any of various viscid, amorphous exudations from plants, hardening on exposure to air and soluble in or forming a viscid mass with water. |
| 2. | any of various similar exudations, as resin. |
| 3. | a preparation of such a substance, as for use in the arts or bookbinding. |
| 4. | chewing gum. |
| 5. | mucilage; glue. |
| 6. | rubber 1 (def. 1). |
| 7. | gum tree. |
| 8. | Philately. the adhesive by which a postage stamp is affixed. Compare o.g. (def. 1). |
| 9. | Informal. a rubber overshoe or boot. |
| 10. | to smear, stiffen, or stick together with gum. |
| 11. | to clog with or as if with some gummy substance. |
| 12. | to exude or form gum. |
| 13. | to become gummy. |
| 14. | to become clogged with a gummy substance. |
| 15. | gum up, Slang. to spoil or ruin. |
| 16. | gum up the works. work (def. 50). |

noun, verb, gummed, gum⋅ming.| 1. | Often, gums. Also called gingiva. the firm, fleshy tissue covering the alveolar parts of either jaw and enveloping the necks of the teeth. |
| 2. | to masticate (food) with the gums instead of teeth. |
| 3. | to shape or renew the teeth of (a saw), as by grinding. |
| 4. | beat one's gums, Slang. to talk excessively or ineffectively. |

gum 1 (gŭm)
n.
Any of various viscous substances that are exuded by certain plants and trees and dry into water-soluble, noncrystalline, brittle solids.
A similar plant exudate, such as a resin.
Any of various adhesives made from such exudates or other sticky substance.
gum 2
n.
The firm connective tissue covered by mucous membrane that envelops the alveolar arches of the jaw and surrounds the bases of the teeth. Also called gingiva. v. gummed, gum·ming, gums
To chew food with toothless gums.
| gum 1 (gŭm) Pronunciation Key
Any of various sticky substances that are produced by certain plants and trees and dry into brittle solids soluble in water. Gums typically are colloidal mixtures of polysaccharides and mineral salts. |
| gum 2 (gŭm) Pronunciation Key
See gingiva. |