a very complicated puzzle.
anything very complicated or perplexing.
Origin of Chinese puzzle
First recorded in 1805–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for chinese puzzle
an intricate puzzle, esp one consisting of boxes within boxes
a complicated problem
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