be witness to something

be (a) witness to (something)

1. To see something happen. I was a witness to many inappropriate situations when I worked in an office. Were you witness to the accident, or did you arrive at the scene after it happened?
2. To be proof of something. The many students on campus these days are a witness to the school's successful rebranding efforts.
See also: to, witness
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

be (a) ˈwitness to something


1 (formal) see something take place: He has been witness to a terrible murder.
2 (written) show that something is true; provide evidence for something: His good health is a witness to the success of the treatment.
See also: something, to, witness
Farlex Partner Idioms Dictionary © Farlex 2017
See also: