Entry 1 sense Webster, 1913 booyong · IPA 01 n. large tree (Heritiera trifoliolata or Terrietia trifoliolata) of Australasia. 1. large tree (Heritiera trifoliolata or Terrietia trifoliolata) of Australasia. Syn. red beech, brown oak, crow's foot, stave wood, silky elm.