[ yoo-puh s ]
/ ˈyu pəs /


the poisonous milky sap of a large tree, Antiaris toxicaria, of the mulberry family, native to tropical Asia, Africa, and the Philippine Islands, used for arrow poison.
the tree itself.

Origin of upas

1775–85; < Javanese: poison, especially dart poison
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for upas

British Dictionary definitions for upas


/ (ˈjuːpəs) /


a large moraceous tree of Java, Antiaria toxicaria, having whitish bark and poisonous milky sap
the sap of this tree, used as an arrow poison

Also: antiar

Word Origin for upas

C19: from Malay: poison
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012