Gum tree Meaning, Definition & Usage

  1. noun any of various trees of the genera Eucalyptus or Liquidambar or Nyssa that are sources of gum
    gum.

WordNet

Definitions
  1. the name given to several trees in America and Australia : (a) The black gum (Nyssa multiflora), one of the largest trees of the Southern States, bearing a small blue fruit, the favorite food of the opossum. Most of the large trees become hollow. (b) A tree of the genus Eucalyptus. See Eucalpytus. (c) The sweet gum tree of the United States (Liquidambar styraciflua), a large and beautiful tree with pointedly lobed leaves and woody burlike fruit. It exudes an aromatic terebinthine juice.

Webster 1913