Meanings
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1
noun
a tall tropical Asian tree (Antiaris toxicaria) whose poisonous latex has been used to prepare arrow poison
The botanist collected a latex sample from the upas tree without touching the sap.
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2
noun
literary: a person, institution, or influence regarded as poisoning or destroying everything around it
The reformer described corruption as an upas tree spreading harm through the state.
Thesaurus
Etymology
From Indonesian Malay pohon upas, 'poison tree.' Exaggerated European accounts claimed that the Javanese tree killed all life near it; nineteenth-century writers therefore made the upas tree a metaphor for a corrupting presence. The real Antiaris toxicaria yields toxic latex but does not poison its surroundings.