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Definition of chink. 1 : a small cleft, slit, or fissure a chink in the fence. 2 : a weak spot that may leave one vulnerable his lawyers found a chink in the law. 3 : a narrow beam of light shining through a chink.
â see also knight in shining armor at 1knight. â A chink/crack in someone's or something's armor is a weakness that might cause someone or something to fail or to be defeated. They watched carefully for any cracks in the other team's armor. The plan looks good, but we've found/discovered some chinks in its armor.