testify to (something)

testify to (something)

To give sworn testimony that something is true. The doctor was asked to testify to the extent of the plaintiff's injuries in the criminal negligence lawsuit against the construction company. I was happy to testify for Daniel's whereabouts on the evening in question, as I had been with him the whole night.
See also: testify
Farlex Dictionary of Idioms.

testify to something

to swear to something. I will testify to your whereabouts if you wish. I think I know what happened, but I would not testify to it.
See also: testify
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

testify to

v.
1. To make a statement based on personal knowledge in support of some asserted fact; bear witness to something: Many astronauts have testified to the thrill of weightlessness. The witness testified to the accuracy of the defendant's story.
2. To serve as evidence: The wreckage testifies to the strength of the storm.
See also: testify
The American Heritage® Dictionary of Phrasal Verbs.
See also:
  • testify to
  • testify for
  • testify for (someone or something)
  • witness for
  • witness for (someone or something)
  • slattern away (something)
  • testify
  • testify against
  • testify against (someone or something)
  • increase (something) by (something)