Here are some common definitions:
* A formal statement made under oath in a court of law. This is the most common legal definition.
* A statement or piece of evidence presented in support of a claim or opinion. This definition applies more broadly than just legal settings. It can be used to describe a person's personal experience or a piece of physical evidence.
* A demonstration or expression of something. This definition is less common, but it can be used to describe something that provides evidence of a certain quality or belief.
Examples:
* Legal: "The witness provided crucial testimony that helped convict the defendant."
* General: "The archaeological findings provide strong testimony to the existence of a ancient civilization."
* Figurative: "The beautiful scenery was a testament to the power of nature."
Ultimately, the specific meaning of "testimony" will depend on the context in which it is used.