Australia, New Zealand, and the United States, especially as associated in the mutual defense treaty (ANZUS Pact, or ANZUS Treaty ) of 1952.
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British Dictionary definitions for ANZUS
Australia, New Zealand, and the United States, with reference to the security alliance between them
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