Definition:
The term "hair's-breadth" is a noun that refers to a very small distance or space. It is used to describe something that is extremely close, almost to the point of being too close to call.
While "hair's-breadth" primarily refers to a small distance, it can also imply a close call in various contexts, like competitions, decisions, or even relationships.
In summary, "hair's-breadth" is a useful expression in English when you want to describe something that is very close or narrowly avoided.