/ ˈtestəmənt; NAmE / noun ( formal )
1.
[ C , usually sing. , U ] testament (to sth) a thing that shows that sth else exists or is true
SYN testimony :
The new model is a testament to the skill and dedication of the workforce.
2.
[ C ] = will :
This is the last will and testament of ...
—see also New Testament , Old Testament
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WORD ORIGIN
Middle English : from Latin testamentum a will (from testari testify), in Christian Latin also translating Greek diathēkē covenant.