Threshold has a few meanings:
* The point at which something begins to happen or have an effect: This is the most common meaning. For example, "The threshold for pain is different for everyone."
* The entrance to a building or room: Think of the doorway or entry point.
* A minimum level or amount: For instance, "The threshold for entry into the competition is 18 years old."
It's important to note that "thersold" is not a standard word in English. If you see it used, it's likely a typo and should be replaced with "threshold".