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Consult Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments). Enter your search and choose your title from the drop-down menu.

Search results for 'gum':

gum1 noun the firm fibrous flesh surrounding the roots of the teeth.
ETYMOLOGY: Anglo-Saxon goma palate.

gum2 noun 1 any of various substances found in certain plants, especially trees, that produce a sticky solution or gel when added to water, used in confectionery, gummed envelopes, etc. 2 this or any similar substance used as glue. 3 a gumdrop. 4 colloq chewing-gum. verb (gummed, gumming) to smear, glue or unite something with gum.
ETYMOLOGY: 13c: from French gomme, from Latin gummi.

gum something up 1 to stick something to itself so that it no longer functions properly. 2 (often gum up the works colloq) to prevent (a machine, scheme, etc) from working properly.