RED GUM Meaning of RED GUM in English [red gum] n (1788) 1 a: any of several Australian eucalyptus trees (esp. Eucalyptus camaldulensis, E. amygdalina, and E. calophylla) b: eucalyptus gum 2: sweet gum Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012