plural testaments
1
: proof or evidence that something exists or is true
The success of the album, which is only available online, is a testament to the power/strength of the Internet.
The event is testament to [=evidence of] what a small group of determined people can do.
2
law
: the legal instructions in which you say who should receive your property, possessions, etc., after you die : will
a person's last will and testament



