simple past tense and past participle of demonstrate
"The scientist demonstrated that the new theory could predict weather patterns more accurately than previous models."
In plain English: To demonstrate something means to show it clearly by doing it or proving it is true.
"The new software update demonstrated how much faster the computer was running."
Usage: Use demonstrated to describe an action that was clearly shown or proved in the past. It functions identically to other regular verbs when indicating that evidence supports a specific claim or capability.
having been demonstrated or verified beyond doubt
"The new safety protocol was not just suggested, but thoroughly demonstrated to be effective before being adopted by all branches."
Derived from Latin demonstratus, the past participle of demonstrare meaning "to show" or "point out," it entered English via Old French. The term originally referred to the act of making something evident by direct observation or proof.