noun

• (figuratively) A vulnerability or flaw in a protection system or in any otherwise formidable system.
  "The chink in the theory is that the invaders have superior muskets."

verb

• (transitive) To fill an opening such as the space between logs in a log house with chinking; to caulk.
  "to chink a wall"
• (intransitive) To crack; to open.
• (transitive) To cause to open in cracks or fissures.

noun

• (countable) A slight sound as of metal objects touching each other; a clink.
  "She swallow, set the cup down like she want to break it, and the ice-blocks jump, make a chink sound."
• (uncountable, colloquial, dated, now rare) Ready money, especially in the form of coins.
  "to leave his chink to better hands"

verb

• (intransitive) To make a slight sound like that of metal objects touching.
  "The coins were chinking in his pocket."
• (transitive) To cause to make a sharp metallic sound, as coins, small pieces of metal, etc., by bringing them into collision with each other.
  "He chinks his purse"