v., -fied, -fy·ing, -fies. v.intr.
- To make a declaration of truth or fact under oath; submit testimony: witnesses testifying before a grand jury.
- To express or declare a strong belief, especially to make a declaration of faith.
- To make a statement based on personal knowledge in support of an asserted fact; bear witness: the exhilaration of weightlessness, to which many astronauts have testified.
- To serve as evidence: wreckage that testifies to the ferocity of the storm.
- To declare publicly; make known: testifying their faith.
- To state or affirm under oath: testified in court that he saw the defendant.
- To bear witness to; provide evidence for. See synonyms at indicate.
[Middle English testifien, from Latin testificārī : testis, witness + -ficārī, -fy.]
testification tes'ti·fi·ca'tion (-fĭ-kā'shən) n.testifier tes'ti·fi'er n.







