noun

1. a sticky, colloidal carbohydrate found in certain trees and plants, which dries into an uncrystallized, brittle mass that dissolves or swells in water
2. any similar plant secretion, as resin
3. any plant gum processed for use in industry, art, etc.
4. 1. an adhesive, as on the back of a postage stamp
   2. any of various sticky or viscous substances or deposits
5. 1. gum tree
   2. the wood of a gum tree
6. Now Rare
   1. pure rubber
   2. ☆ rubber overshoes
7. ☆ chewing gum
8. ☆ Dialectal a hollowed gum log used as a trough, etc.

Etymology: ME gomme < OFr < LL gumma < L gummi, cummi < Gr kommi < Egypt qmyt

transitive verb gummed, gumming gum′·ming

intransitive verb

1. to secrete or form gum
2. to become sticky or clogged