The term "chink" has several meanings, depending on its context.
1) It can refer to a small opening or gap, as in "there's a chink in the armor."
2) In architecture and construction, it refers to a narrow vertical space between two surfaces, such as bricks or tiles.
3) In a more negative connotation, it is used to describe a weakness or vulnerability, often referring to an unprotected spot or area. For example, "there's a chink in the enemy's defenses."
4) It can also refer to a person of Chinese descent, particularly when used in reference to their eyes, as in "she has a chink in her eye" (meaning she has a small crease or fold in her eyelid).